221220011111202 has 12 divisors (see below), whose sum is σ = 479310024074310. Its totient is φ = 73740003703728.

The previous prime is 221220011111179. The next prime is 221220011111219. The reversal of 221220011111202 is 202111110022122.

221220011111202 is a `hidden beast` number, since 221 + 220 + 0 + 1 + 11 + 11 + 202 = 666.

It can be written as a sum of positive squares in only one way, i.e., 211930676349921 + 9289334761281 = 14557839^2 + 3047841^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12290000617289 = 221220011111202 / (2 + 2 + 1 + 2 + 2 + 0 + 0 + 1 + 1 + 1 + 1 + 1 + 2 + 0 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6145000308627 + ... + 6145000308662.

Almost surely, 2^{221220011111202} is an apocalyptic number.

221220011111202 is an abundant number, since it is smaller than the sum of its proper divisors (258090012963108).

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

221220011111202 is a wasteful number, since it uses less digits than its factorization.

221220011111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12290000617297 (or 12290000617294 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221220011111202 its reverse (202111110022122), we get a palindrome (423331121133324).

The spelling of 221220011111202 in words is "two hundred twenty-one trillion, two hundred twenty billion, eleven million, one hundred eleven thousand, two hundred two".