11531121551402 has 16 divisors (see below), whose sum is σ = 17347557444000. Its totient is φ = 5748604907760.

The previous prime is 11531121551353. The next prime is 11531121551429. The reversal of 11531121551402 is 20415512113511.

11531121551402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8691377 + ... + 9929867.

It is an arithmetic number, because the mean of its divisors is an integer number (1084222340250).

Almost surely, 2^{11531121551402} is an apocalyptic number.

11531121551402 is a deficient number, since it is larger than the sum of its proper divisors (5816435892598).

11531121551402 is a wasteful number, since it uses less digits than its factorization.

11531121551402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252181.

The product of its (nonzero) digits is 6000, while the sum is 32.

Adding to 11531121551402 its reverse (20415512113511), we get a palindrome (31946633664913).

The spelling of 11531121551402 in words is "eleven trillion, five hundred thirty-one billion, one hundred twenty-one million, five hundred fifty-one thousand, four hundred two".