201221202101122 has 48 divisors (see below), whose sum is σ = 379071151911360. Its totient is φ = 78366066492672.

The previous prime is 201221202101081. The next prime is 201221202101131. The reversal of 201221202101122 is 221101202122102.

It is a self number, because there is not a number n which added to its sum of digits gives 201221202101122.

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, 857354508 + ... + 857589175.

It is an arithmetic number, because the mean of its divisors is an integer number (7897315664820).

Almost surely, 2^{201221202101122} is an apocalyptic number.

201221202101122 is a deficient number, since it is larger than the sum of its proper divisors (177849949810238).

201221202101122 is a wasteful number, since it uses less digits than its factorization.

201221202101122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714943755 (or 1714943738 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201221202101122 its reverse (221101202122102), we get a palindrome (422322404223224).

The spelling of 201221202101122 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred two million, one hundred one thousand, one hundred twenty-two".