13121440332 has 96 divisors (see below), whose sum is σ = 41107766784. Its totient is φ = 3145996800.

The previous prime is 13121440309. The next prime is 13121440373. The reversal of 13121440332 is 23304412131.

It is a happy number.

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, 534169 + ... + 558192.

It is an arithmetic number, because the mean of its divisors is an integer number (428205904).

Almost surely, 2^13121440332 is an apocalyptic number.

13121440332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13121440332 is an abundant number, since it is smaller than the sum of its proper divisors (27986326452).

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

13121440332 is a wasteful number, since it uses less digits than its factorization.

13121440332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092399 (or 1092397 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 13121440332 its reverse (23304412131), we get a palindrome (36425852463).

The spelling of 13121440332 in words is "thirteen billion, one hundred twenty-one million, four hundred forty thousand, three hundred thirty-two".