1321231021120 has 56 divisors (see below), whose sum is σ = 3247671115008. Its totient is φ = 511444262400.

The previous prime is 1321231021057. The next prime is 1321231021169. The reversal of 1321231021120 is 211201321231.

It is a super-2 number, since 2×1321231021120² (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, 66584386 + ... + 66604225.

Almost surely, 2^{1321231021120} is an apocalyptic number.

1321231021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321231021120 is an abundant number, since it is smaller than the sum of its proper divisors (1926440093888).

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

1321231021120 is a wasteful number, since it uses less digits than its factorization.

1321231021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133188659 (or 133188649 counting only the distinct ones).

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

Adding to 1321231021120 its reverse (211201321231), we get a palindrome (1532432342351).

The spelling of 1321231021120 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-one million, twenty-one thousand, one hundred twenty".