20220100121 has 4 divisors (see below), whose sum is σ = 21775492452. Its totient is φ = 18664707792.

The previous prime is 20220100097. The next prime is 20220100127. The reversal of 20220100121 is 12100102202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12687769600 + 7532330521 = 112640^2 + 86789^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220100121 - 2³⁴ = 3040230937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20220100127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777696146 + ... + 777696171.

It is an arithmetic number, because the mean of its divisors is an integer number (5443873113).

Almost surely, 2^20220100121 is an apocalyptic number.

It is an amenable number.

20220100121 is a deficient number, since it is larger than the sum of its proper divisors (1555392331).

20220100121 is a wasteful number, since it uses less digits than its factorization.

20220100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555392330.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20220100121 its reverse (12100102202), we get a palindrome (32320202323).

The spelling of 20220100121 in words is "twenty billion, two hundred twenty million, one hundred thousand, one hundred twenty-one".