111212101220202 has 24 divisors (see below), whose sum is σ = 241017517576836. Its totient is φ = 37061782724736.

The previous prime is 111212101220197. The next prime is 111212101220273. The reversal of 111212101220202 is 202022101212111.

111212101220202 is a `hidden beast` number, since 1 + 11 + 21 + 210 + 1 + 220 + 202 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 98887093751601 + 12325007468601 = 9944199^2 + 3510699^2 .

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, 743063263 + ... + 743212914.

Almost surely, 2^{111212101220202} is an apocalyptic number.

111212101220202 is an abundant number, since it is smaller than the sum of its proper divisors (129805416356634).

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

111212101220202 is a wasteful number, since it uses less digits than its factorization.

111212101220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486280342 (or 1486280339 counting only the distinct ones).

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

Adding to 111212101220202 its reverse (202022101212111), we get a palindrome (313234202432313).

The spelling of 111212101220202 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred one million, two hundred twenty thousand, two hundred two".