201021200110122 has 128 divisors (see below), whose sum is σ = 510431572574208. Its totient is φ = 51454794931200.

The previous prime is 201021200110057. The next prime is 201021200110177. The reversal of 201021200110122 is 221011002120102.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 73092528 + ... + 75792875.

It is an arithmetic number, because the mean of its divisors is an integer number (3987746660736).

Almost surely, 2^{201021200110122} is an apocalyptic number.

201021200110122 is an abundant number, since it is smaller than the sum of its proper divisors (309410372464086).

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

201021200110122 is a wasteful number, since it uses less digits than its factorization.

201021200110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148885524.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201021200110122 its reverse (221011002120102), we get a palindrome (422032202230224).

The spelling of 201021200110122 in words is "two hundred one trillion, twenty-one billion, two hundred million, one hundred ten thousand, one hundred twenty-two".