123020131131 has 10 divisors (see below), whose sum is σ = 183770813292. Its totient is φ = 82013420700.

The previous prime is 123020131127. The next prime is 123020131147. The reversal of 123020131131 is 131131020321.

123020131131 is a `hidden beast` number, since 123 + 0 + 201 + 311 + 31 = 666.

It is not a de Polignac number, because 123020131131 - 2² = 123020131127 is a prime.

It is a super-2 number, since 2×123020131131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123020131631) 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 9 ways as a sum of consecutive naturals, for example, 759383445 + ... + 759383606.

Almost surely, 2^123020131131 is an apocalyptic number.

123020131131 is a deficient number, since it is larger than the sum of its proper divisors (60750682161).

123020131131 is an equidigital number, since it uses as much as digits as its factorization.

123020131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518767063 (or 1518767054 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 123020131131 its reverse (131131020321), we get a palindrome (254151151452).

The spelling of 123020131131 in words is "one hundred twenty-three billion, twenty million, one hundred thirty-one thousand, one hundred thirty-one".