11131021542 has 32 divisors (see below), whose sum is σ = 22331054592. Its totient is φ = 3698858624.

The previous prime is 11131021523. The next prime is 11131021619. The reversal of 11131021542 is 24512013111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3154183 + ... + 3157709.

It is an arithmetic number, because the mean of its divisors is an integer number (697845456).

Almost surely, 2^11131021542 is an apocalyptic number.

11131021542 is an abundant number, since it is smaller than the sum of its proper divisors (11200033050).

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

11131021542 is a wasteful number, since it uses less digits than its factorization.

11131021542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5012.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 11131021542 its reverse (24512013111), we get a palindrome (35643034653).

The spelling of 11131021542 in words is "eleven billion, one hundred thirty-one million, twenty-one thousand, five hundred forty-two".