20222100121 has 4 divisors (see below), whose sum is σ = 21286421200. Its totient is φ = 19157779044.

The previous prime is 20222100109. The next prime is 20222100137. The reversal of 20222100121 is 12100122202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20222100121 - 2⁷ = 20222099993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20222100221) 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, 532160511 + ... + 532160548.

It is an arithmetic number, because the mean of its divisors is an integer number (5321605300).

Almost surely, 2^20222100121 is an apocalyptic number.

It is an amenable number.

20222100121 is a deficient number, since it is larger than the sum of its proper divisors (1064321079).

20222100121 is a wasteful number, since it uses less digits than its factorization.

20222100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064321078.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20222100121 its reverse (12100122202), we get a palindrome (32322222323).

The spelling of 20222100121 in words is "twenty billion, two hundred twenty-two million, one hundred thousand, one hundred twenty-one".