1312231101220 has 48 divisors (see below), whose sum is σ = 3096689863680. Its totient is φ = 463450179456.

The previous prime is 1312231101211. The next prime is 1312231101227. The reversal of 1312231101220 is 221011322131.

It is not an unprimeable number, because it can be changed into a prime (1312231101227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109712340 + ... + 109724299.

It is an arithmetic number, because the mean of its divisors is an integer number (64514372160).

Almost surely, 2^{1312231101220} is an apocalyptic number.

1312231101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312231101220 is an abundant number, since it is smaller than the sum of its proper divisors (1784458762460).

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

1312231101220 is a wasteful number, since it uses less digits than its factorization.

1312231101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219436684 (or 219436682 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1312231101220 its reverse (221011322131), we get a palindrome (1533242423351).

The spelling of 1312231101220 in words is "one trillion, three hundred twelve billion, two hundred thirty-one million, one hundred one thousand, two hundred twenty".