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10011001021 = 71788395273
BaseRepresentation
bin10010101001011001…
…11100000010111101
3221211200110112200121
421110230330002331
5131000304013041
64333214254541
7503040050620
oct112454740275
927750415617
1010011001021
114277a4926a
121b347b7451
13c3706c858
146ad7c7db7
153d8d327d1
hex254b3c0bd

10011001021 has 16 divisors (see below), whose sum is σ = 12127999104. Its totient is φ = 8066870784.

The previous prime is 10011001003. The next prime is 10011001051. The reversal of 10011001021 is 12010011001.

Adding to 10011001021 its reverse (12010011001), we get a palindrome (22021012022).

10011001021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10011001021 - 217 = 10010869949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a junction number, because it is equal to n+sod(n) for n = 10011000995 and 10011001013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011001051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57441 + ... + 152713.

It is an arithmetic number, because the mean of its divisors is an integer number (757999944).

Almost surely, 210011001021 is an apocalyptic number.

It is an amenable number.

10011001021 is a deficient number, since it is larger than the sum of its proper divisors (2116998083).

10011001021 is an equidigital number, since it uses as much as digits as its factorization.

10011001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96180.

The product of its (nonzero) digits is 2, while the sum is 7.

The spelling of 10011001021 in words is "ten billion, eleven million, one thousand, twenty-one".

Divisors: 1 7 17 119 883 6181 15011 95273 105077 666911 1619641 11337487 84126059 588882413 1430143003 10011001021