201221200102 has 32 divisors (see below), whose sum is σ = 325928988000. Its totient is φ = 92620350720.

The previous prime is 201221200091. The next prime is 201221200151. The reversal of 201221200102 is 201002122102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21960402 + ... + 21969562.

It is an arithmetic number, because the mean of its divisors is an integer number (10185280875).

Almost surely, 2^201221200102 is an apocalyptic number.

201221200102 is a deficient number, since it is larger than the sum of its proper divisors (124707787898).

201221200102 is a wasteful number, since it uses less digits than its factorization.

201221200102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11368.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201221200102 its reverse (201002122102), we get a palindrome (402223322204).

The spelling of 201221200102 in words is "two hundred one billion, two hundred twenty-one million, two hundred thousand, one hundred two".