1231312301220 has 24 divisors (see below), whose sum is σ = 3447674443584. Its totient is φ = 328349946976.

The previous prime is 1231312301213. The next prime is 1231312301291. The reversal of 1231312301220 is 221032131321.

It is a super-2 number, since 2×1231312301220² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10260935784 + ... + 10260935903.

It is an arithmetic number, because the mean of its divisors is an integer number (143653101816).

Almost surely, 2^{1231312301220} is an apocalyptic number.

1231312301220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231312301220 is an abundant number, since it is smaller than the sum of its proper divisors (2216362142364).

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

1231312301220 is a wasteful number, since it uses less digits than its factorization.

1231312301220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20521871699 (or 20521871697 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1231312301220 its reverse (221032131321), we get a palindrome (1452344432541).

The spelling of 1231312301220 in words is "one trillion, two hundred thirty-one billion, three hundred twelve million, three hundred one thousand, two hundred twenty".