11521305125031 has 16 divisors (see below), whose sum is σ = 16630027223040. Its totient is φ = 7052913322080.

The previous prime is 11521305125021. The next prime is 11521305125039. The reversal of 11521305125031 is 13052150312511.

It is a de Polignac number, because none of the positive numbers 2^k-11521305125031 is a prime.

It is a super-2 number, since 2×11521305125031² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11521305125031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11521305125039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 773338311 + ... + 773353208.

It is an arithmetic number, because the mean of its divisors is an integer number (1039376701440).

Almost surely, 2^{11521305125031} is an apocalyptic number.

11521305125031 is a deficient number, since it is larger than the sum of its proper divisors (5108722098009).

11521305125031 is a wasteful number, since it uses less digits than its factorization.

11521305125031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546691726.

The product of its (nonzero) digits is 4500, while the sum is 30.

Adding to 11521305125031 its reverse (13052150312511), we get a palindrome (24573455437542).

The spelling of 11521305125031 in words is "eleven trillion, five hundred twenty-one billion, three hundred five million, one hundred twenty-five thousand, thirty-one".