1312232221020 has 96 divisors (see below), whose sum is σ = 4201856064000. Its totient is φ = 299745010944.

The previous prime is 1312232220991. The next prime is 1312232221061. The reversal of 1312232221020 is 201222322131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent 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, 357930 + ... + 1659089.

It is an arithmetic number, because the mean of its divisors is an integer number (43769334000).

Almost surely, 2^{1312232221020} is an apocalyptic number.

1312232221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312232221020 is an abundant number, since it is smaller than the sum of its proper divisors (2889623842980).

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

1312232221020 is a wasteful number, since it uses less digits than its factorization.

1312232221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018587 (or 2018585 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1312232221020 its reverse (201222322131), we get a palindrome (1513454543151).

The spelling of 1312232221020 in words is "one trillion, three hundred twelve billion, two hundred thirty-two million, two hundred twenty-one thousand, twenty".