20012122201121 has 16 divisors (see below), whose sum is σ = 20752205702400. Its totient is φ = 19275391943808.

The previous prime is 20012122201111. The next prime is 20012122201129. The reversal of 20012122201121 is 12110222121002.

It is a cyclic number.

It is not a de Polignac number, because 20012122201121 - 2²⁶ = 20012055092257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20012122201121.

It is not an unprimeable number, because it can be changed into a prime (20012122201129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58978970 + ... + 59317308.

It is an arithmetic number, because the mean of its divisors is an integer number (1297012856400).

Almost surely, 2^{20012122201121} is an apocalyptic number.

It is an amenable number.

20012122201121 is a deficient number, since it is larger than the sum of its proper divisors (740083501279).

20012122201121 is a wasteful number, since it uses less digits than its factorization.

20012122201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343288.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20012122201121 its reverse (12110222121002), we get a palindrome (32122344322123).

The spelling of 20012122201121 in words is "twenty trillion, twelve billion, one hundred twenty-two million, two hundred one thousand, one hundred twenty-one".