201021022220122 has 8 divisors (see below), whose sum is σ = 324726266663316. Its totient is φ = 92778933332352.

The previous prime is 201021022220111. The next prime is 201021022220189. The reversal of 201021022220122 is 221022220120102.

It can be written as a sum of positive squares in 2 ways, for example, as 178072984671201 + 22948037548921 = 13344399^2 + 4790411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 201021022220122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3865788888823 + ... + 3865788888874.

Almost surely, 2^{201021022220122} is an apocalyptic number.

201021022220122 is a deficient number, since it is larger than the sum of its proper divisors (123705244443194).

201021022220122 is a wasteful number, since it uses less digits than its factorization.

201021022220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7731577777712.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 201021022220122 its reverse (221022220120102), we get a palindrome (422043242340224).

The spelling of 201021022220122 in words is "two hundred one trillion, twenty-one billion, twenty-two million, two hundred twenty thousand, one hundred twenty-two".