20131121132 has 12 divisors (see below), whose sum is σ = 37301783400. Its totient is φ = 9473468736.

The previous prime is 20131121117. The next prime is 20131121141. The reversal of 20131121132 is 23112113102.

It is a super-2 number, since 2×20131121132² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20131121132.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148022882 + ... + 148023017.

It is an arithmetic number, because the mean of its divisors is an integer number (3108481950).

Almost surely, 2^20131121132 is an apocalyptic number.

It is an amenable number.

20131121132 is a deficient number, since it is larger than the sum of its proper divisors (17170662268).

20131121132 is a wasteful number, since it uses less digits than its factorization.

20131121132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296045920 (or 296045918 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20131121132 its reverse (23112113102), we get a palindrome (43243234234).

The spelling of 20131121132 in words is "twenty billion, one hundred thirty-one million, one hundred twenty-one thousand, one hundred thirty-two".