221112212202 has 48 divisors (see below), whose sum is σ = 547547836992. Its totient is φ = 63171239040.

The previous prime is 221112212197. The next prime is 221112212263. The reversal of 221112212202 is 202212211122.

It is a happy number.

221112212202 is a `hidden beast` number, since 221 + 1 + 1 + 221 + 220 + 2 = 666.

It is a super-2 number, since 2×221112212202² (a number of 23 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 2711793 + ... + 2792139.

It is an arithmetic number, because the mean of its divisors is an integer number (11407246604).

Almost surely, 2^221112212202 is an apocalyptic number.

221112212202 is an abundant number, since it is smaller than the sum of its proper divisors (326435624790).

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

221112212202 is a wasteful number, since it uses less digits than its factorization.

221112212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102203 (or 102200 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221112212202 its reverse (202212211122), we get a palindrome (423324423324).

The spelling of 221112212202 in words is "two hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, two hundred two".