221212211202 has 48 divisors (see below), whose sum is σ = 504755091360. Its totient is φ = 69823809216.

The previous prime is 221212211189. The next prime is 221212211219. The reversal of 221212211202 is 202112212122.

It is a happy number.

221212211202 is a `hidden beast` number, since 221 + 21 + 221 + 1 + 202 = 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 23 ways as a sum of consecutive naturals, for example, 586113 + ... + 886539.

It is an arithmetic number, because the mean of its divisors is an integer number (10515731070).

Almost surely, 2^221212211202 is an apocalyptic number.

221212211202 is an abundant number, since it is smaller than the sum of its proper divisors (283542880158).

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

221212211202 is a wasteful number, since it uses less digits than its factorization.

221212211202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302607 (or 302604 counting only the distinct ones).

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

Adding to 221212211202 its reverse (202112212122), we get a palindrome (423324423324).

The spelling of 221212211202 in words is "two hundred twenty-one billion, two hundred twelve million, two hundred eleven thousand, two hundred two".