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BaseRepresentation
bin111100010101010…
…110011111101001
32121112200121200111
4330111112133221
54033112330441
6244235334321
734040546140
oct7425263751
92545617614
101012230121
1147a417521
12242bb13a1
1313192cb46
1498612757
155dcea081
hex3c5567e9

1012230121 has 4 divisors (see below), whose sum is σ = 1156834432. Its totient is φ = 867625812.

The previous prime is 1012230113. The next prime is 1012230169. The reversal of 1012230121 is 1210322101.

Adding to 1012230121 its reverse (1210322101), we get a palindrome (2222552222).

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: 1210322101 = 1415385517.

It is a cyclic number.

It is not a de Polignac number, because 1012230121 - 23 = 1012230113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012230221) 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, 72302145 + ... + 72302158.

It is an arithmetic number, because the mean of its divisors is an integer number (289208608).

Almost surely, 21012230121 is an apocalyptic number.

It is an amenable number.

1012230121 is a deficient number, since it is larger than the sum of its proper divisors (144604311).

1012230121 is an equidigital number, since it uses as much as digits as its factorization.

1012230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144604310.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1012230121 is about 31815.5641314122. The cubic root of 1012230121 is about 1004.0601994692.

The spelling of 1012230121 in words is "one billion, twelve million, two hundred thirty thousand, one hundred twenty-one".

Divisors: 1 7 144604303 1012230121