1220323113212 has 24 divisors (see below), whose sum is σ = 2497405443456. Its totient is φ = 510832930608.

The previous prime is 1220323113167. The next prime is 1220323113241. The reversal of 1220323113212 is 2123113230221.

It is a congruent number.

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, 506777498 + ... + 506779905.

It is an arithmetic number, because the mean of its divisors is an integer number (104058560144).

Almost surely, 2^{1220323113212} is an apocalyptic number.

It is an amenable number.

1220323113212 is an abundant number, since it is smaller than the sum of its proper divisors (1277082330244).

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

1220323113212 is a wasteful number, since it uses less digits than its factorization.

1220323113212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013557457 (or 1013557455 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1220323113212 its reverse (2123113230221), we get a palindrome (3343436343433).

The spelling of 1220323113212 in words is "one trillion, two hundred twenty billion, three hundred twenty-three million, one hundred thirteen thousand, two hundred twelve".