11231515015144 has 128 divisors (see below), whose sum is σ = 23032492560000. Its totient is φ = 5113780568064.

The previous prime is 11231515015129. The next prime is 11231515015169. The reversal of 11231515015144 is 44151051513211.

It is a super-2 number, since 2×11231515015144² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 364964142 + ... + 364994914.

It is an arithmetic number, because the mean of its divisors is an integer number (179941348125).

Almost surely, 2^{11231515015144} is an apocalyptic number.

It is an amenable number.

11231515015144 is an abundant number, since it is smaller than the sum of its proper divisors (11800977544856).

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

11231515015144 is a wasteful number, since it uses less digits than its factorization.

11231515015144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31427 (or 31423 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 34.

Adding to 11231515015144 its reverse (44151051513211), we get a palindrome (55382566528355).

The spelling of 11231515015144 in words is "eleven trillion, two hundred thirty-one billion, five hundred fifteen million, fifteen thousand, one hundred forty-four".