211221222202 has 32 divisors (see below), whose sum is σ = 324536984640. Its totient is φ = 103083027840.

The previous prime is 211221222169. The next prime is 211221222211. The reversal of 211221222202 is 202222122112.

It is a super-2 number, since 2×211221222202² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211221222202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3885453 + ... + 3939439.

It is an arithmetic number, because the mean of its divisors is an integer number (10141780770).

Almost surely, 2^211221222202 is an apocalyptic number.

211221222202 is a deficient number, since it is larger than the sum of its proper divisors (113315762438).

211221222202 is a wasteful number, since it uses less digits than its factorization.

211221222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54366.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 211221222202 its reverse (202222122112), we get a palindrome (413443344314).

The spelling of 211221222202 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred two".