123222121131 has 4 divisors (see below), whose sum is σ = 164296161512. Its totient is φ = 82148080752.

The previous prime is 123222121097. The next prime is 123222121177. The reversal of 123222121131 is 131121222321.

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

It is not a de Polignac number, because 123222121131 - 2²⁷ = 123087903403 is a prime.

It is a super-2 number, since 2×123222121131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123222121098 and 123222121107.

It is not an unprimeable number, because it can be changed into a prime (123222121931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20537020186 + ... + 20537020191.

It is an arithmetic number, because the mean of its divisors is an integer number (41074040378).

Almost surely, 2^123222121131 is an apocalyptic number.

123222121131 is a deficient number, since it is larger than the sum of its proper divisors (41074040381).

123222121131 is an equidigital number, since it uses as much as digits as its factorization.

123222121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41074040380.

The product of its digits is 288, while the sum is 21.

Adding to 123222121131 its reverse (131121222321), we get a palindrome (254343343452).

The spelling of 123222121131 in words is "one hundred twenty-three billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred thirty-one".