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10500310121 = 71500044303
BaseRepresentation
bin10011100011101111…
…00000010001101001
31000002210012000120212
421301313200101221
5133001034410441
64453534030505
7521131110020
oct116167402151
930083160525
1010500310121
1144a9173454
122050648435
13cb4550772
147187998b7
15416c87eeb
hex271de0469

10500310121 has 4 divisors (see below), whose sum is σ = 12000354432. Its totient is φ = 9000265812.

The previous prime is 10500310087. The next prime is 10500310153. The reversal of 10500310121 is 12101300501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12101300501 = 79153181019.

It is a cyclic number.

It is not a de Polignac number, because 10500310121 - 26 = 10500310057 is a prime.

It is a super-2 number, since 2×105003101212 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10500310096 and 10500310105.

It is not an unprimeable number, because it can be changed into a prime (10500310721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750022145 + ... + 750022158.

It is an arithmetic number, because the mean of its divisors is an integer number (3000088608).

Almost surely, 210500310121 is an apocalyptic number.

It is an amenable number.

10500310121 is a deficient number, since it is larger than the sum of its proper divisors (1500044311).

10500310121 is an equidigital number, since it uses as much as digits as its factorization.

10500310121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500044310.

The product of its (nonzero) digits is 30, while the sum is 14.

Adding to 10500310121 its reverse (12101300501), we get a palindrome (22601610622).

The spelling of 10500310121 in words is "ten billion, five hundred million, three hundred ten thousand, one hundred twenty-one".

Divisors: 1 7 1500044303 10500310121