20122100222121 has 12 divisors (see below), whose sum is σ = 29250384896772. Its totient is φ = 13329289318176.

The previous prime is 20122100222069. The next prime is 20122100222137. The reversal of 20122100222121 is 12122200122102.

It is a happy number.

20122100222121 is a `hidden beast` number, since 201 + 22 + 100 + 222 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3694318487721 + 16427781734400 = 1922061^2 + 4053120^2 .

It is not a de Polignac number, because 20122100222121 - 2²⁶ = 20122033113257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122100222094 and 20122100222103.

It is not an unprimeable number, because it can be changed into a prime (20122100222821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7120345446 + ... + 7120348271.

It is an arithmetic number, because the mean of its divisors is an integer number (2437532074731).

Almost surely, 2^{20122100222121} is an apocalyptic number.

It is an amenable number.

20122100222121 is a deficient number, since it is larger than the sum of its proper divisors (9128284674651).

20122100222121 is a wasteful number, since it uses less digits than its factorization.

20122100222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14240693880 (or 14240693877 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20122100222121 its reverse (12122200122102), we get a palindrome (32244300344223).

The spelling of 20122100222121 in words is "twenty trillion, one hundred twenty-two billion, one hundred million, two hundred twenty-two thousand, one hundred twenty-one".