22131000121 has 4 divisors (see below), whose sum is σ = 22601872512. Its totient is φ = 21660127732.

The previous prime is 22131000107. The next prime is 22131000127. The reversal of 22131000121 is 12100013122.

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 22131000121 - 2¹⁷ = 22130869049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22131000127) 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, 235436125 + ... + 235436218.

It is an arithmetic number, because the mean of its divisors is an integer number (5650468128).

Almost surely, 2^22131000121 is an apocalyptic number.

It is an amenable number.

22131000121 is a deficient number, since it is larger than the sum of its proper divisors (470872391).

22131000121 is an equidigital number, since it uses as much as digits as its factorization.

22131000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470872390.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 22131000121 its reverse (12100013122), we get a palindrome (34231013243).

The spelling of 22131000121 in words is "twenty-two billion, one hundred thirty-one million, one hundred twenty-one", and thus it is an aban number.