201021012122 has 16 divisors (see below), whose sum is σ = 344922761472. Its totient is φ = 86073034320.

The previous prime is 201021012103. The next prime is 201021012221. The reversal of 201021012122 is 221210120102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 201021012097 and 201021012106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6553154 + ... + 6583757.

It is an arithmetic number, because the mean of its divisors is an integer number (21557672592).

Almost surely, 2^201021012122 is an apocalyptic number.

201021012122 is a deficient number, since it is larger than the sum of its proper divisors (143901749350).

201021012122 is a wasteful number, since it uses less digits than its factorization.

201021012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13138013.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201021012122 its reverse (221210120102), we get a palindrome (422231132224).

The spelling of 201021012122 in words is "two hundred one billion, twenty-one million, twelve thousand, one hundred twenty-two".