123220023131 has 4 divisors (see below), whose sum is σ = 123255122064. Its totient is φ = 123184924200.

The previous prime is 123220023127. The next prime is 123220023139. The reversal of 123220023131 is 131320022321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131320022321 = 911 ⋅144149311.

It is a cyclic number.

It is not a de Polignac number, because 123220023131 - 2² = 123220023127 is a prime.

It is a super-2 number, since 2×123220023131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123220023139) 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, 17544200 + ... + 17551221.

It is an arithmetic number, because the mean of its divisors is an integer number (30813780516).

Almost surely, 2^123220023131 is an apocalyptic number.

123220023131 is a deficient number, since it is larger than the sum of its proper divisors (35098933).

123220023131 is an equidigital number, since it uses as much as digits as its factorization.

123220023131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35098932.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123220023131 its reverse (131320022321), we get a palindrome (254540045452).

The spelling of 123220023131 in words is "one hundred twenty-three billion, two hundred twenty million, twenty-three thousand, one hundred thirty-one".