13031221323012 has 24 divisors (see below), whose sum is σ = 30408778463616. Its totient is φ = 4343369672928.

The previous prime is 13031221323011. The next prime is 13031221323037. The reversal of 13031221323012 is 21032312213031.

It is not an unprimeable number, because it can be changed into a prime (13031221323011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46199548 + ... + 46480755.

It is an arithmetic number, because the mean of its divisors is an integer number (1267032435984).

Almost surely, 2^{13031221323012} is an apocalyptic number.

13031221323012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13031221323012 is an abundant number, since it is smaller than the sum of its proper divisors (17377557140604).

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

13031221323012 is a wasteful number, since it uses less digits than its factorization.

13031221323012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92692027 (or 92692025 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 13031221323012 its reverse (21032312213031), we get a palindrome (34063533536043).

The spelling of 13031221323012 in words is "thirteen trillion, thirty-one billion, two hundred twenty-one million, three hundred twenty-three thousand, twelve".