10521261156 has 72 divisors (see below), whose sum is σ = 28724775744. Its totient is φ = 2936122560.

The previous prime is 10521261139. The next prime is 10521261169. The reversal of 10521261156 is 65116212501.

10521261156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×10521261156² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 121446 + ... + 189186.

Almost surely, 2^10521261156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10521261156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14362387872).

10521261156 is an abundant number, since it is smaller than the sum of its proper divisors (18203514588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10521261156 is a wasteful number, since it uses less digits than its factorization.

10521261156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67841 (or 67796 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 10521261156 its reverse (65116212501), we get a palindrome (75637473657).

The spelling of 10521261156 in words is "ten billion, five hundred twenty-one million, two hundred sixty-one thousand, one hundred fifty-six".