201221221102 has 16 divisors (see below), whose sum is σ = 330168298752. Its totient is φ = 91214966520.

The previous prime is 201221221073. The next prime is 201221221111. The reversal of 201221221102 is 201122122102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12452988 + ... + 12469135.

It is an arithmetic number, because the mean of its divisors is an integer number (20635518672).

Almost surely, 2^201221221102 is an apocalyptic number.

201221221102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201221221102 is a deficient number, since it is larger than the sum of its proper divisors (128947077650).

201221221102 is a wasteful number, since it uses less digits than its factorization.

201221221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24922503.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201221221102 its reverse (201122122102), we get a palindrome (402343343204).

The spelling of 201221221102 in words is "two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred two".