1221312330120 has 64 divisors (see below), whose sum is σ = 3790279656000. Its totient is φ = 314452828928.

The previous prime is 1221312330101. The next prime is 1221312330181. The reversal of 1221312330120 is 210332131221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175472430 + ... + 175479389.

It is an arithmetic number, because the mean of its divisors is an integer number (59223119625).

Almost surely, 2^{1221312330120} is an apocalyptic number.

1221312330120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221312330120 is an abundant number, since it is smaller than the sum of its proper divisors (2568967325880).

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

1221312330120 is a wasteful number, since it uses less digits than its factorization.

1221312330120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350951862 (or 350951858 counting only the distinct ones).

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

Adding to 1221312330120 its reverse (210332131221), we get a palindrome (1431644461341).

The spelling of 1221312330120 in words is "one trillion, two hundred twenty-one billion, three hundred twelve million, three hundred thirty thousand, one hundred twenty".