1213213103220 has 96 divisors (see below), whose sum is σ = 3640155458688. Its totient is φ = 300824092672.

The previous prime is 1213213103209. The next prime is 1213213103243. The reversal of 1213213103220 is 223013123121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7080549 + ... + 7249868.

It is an arithmetic number, because the mean of its divisors is an integer number (37918286028).

Almost surely, 2^{1213213103220} is an apocalyptic number.

1213213103220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213213103220 is an abundant number, since it is smaller than the sum of its proper divisors (2426942355468).

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

1213213103220 is a wasteful number, since it uses less digits than its factorization.

1213213103220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14330529 (or 14330527 counting only the distinct ones).

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

Adding to 1213213103220 its reverse (223013123121), we get a palindrome (1436226226341).

The spelling of 1213213103220 in words is "one trillion, two hundred thirteen billion, two hundred thirteen million, one hundred three thousand, two hundred twenty".