1321220111202 has 24 divisors (see below), whose sum is σ = 2880205811184. Its totient is φ = 437704821144.

The previous prime is 1321220111143. The next prime is 1321220111243. The reversal of 1321220111202 is 2021110221231.

1321220111202 is a `hidden beast` number, since 1 + 321 + 220 + 1 + 1 + 120 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225153868 + ... + 225159735.

It is an arithmetic number, because the mean of its divisors is an integer number (120008575466).

Almost surely, 2^{1321220111202} is an apocalyptic number.

1321220111202 is an abundant number, since it is smaller than the sum of its proper divisors (1558985699982).

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

1321220111202 is a wasteful number, since it uses less digits than its factorization.

1321220111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450313774 (or 450313771 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1321220111202 its reverse (2021110221231), we get a palindrome (3342330332433).

The spelling of 1321220111202 in words is "one trillion, three hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, two hundred two".