201221212002102 has 96 divisors (see below), whose sum is σ = 441116176644000. Its totient is φ = 66286529777664.

The previous prime is 201221212002053. The next prime is 201221212002119. The reversal of 201221212002102 is 201200212122102.

It is a happy number.

201221212002102 is a `hidden beast` number, since 20 + 1 + 221 + 212 + 0 + 0 + 210 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5421249648 + ... + 5421286764.

It is an arithmetic number, because the mean of its divisors is an integer number (4594960173375).

Almost surely, 2^{201221212002102} is an apocalyptic number.

201221212002102 is an abundant number, since it is smaller than the sum of its proper divisors (239894964641898).

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

201221212002102 is a wasteful number, since it uses less digits than its factorization.

201221212002102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43950 (or 43947 counting only the distinct ones).

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

Adding to 201221212002102 its reverse (201200212122102), we get a palindrome (402421424124204).

The spelling of 201221212002102 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred twelve million, two thousand, one hundred two".