123011321131 has 4 divisors (see below), whose sum is σ = 123043876200. Its totient is φ = 122978766064.

The previous prime is 123011321099. The next prime is 123011321177. The reversal of 123011321131 is 131123110321.

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

It is a cyclic number.

It is not a de Polignac number, because 123011321131 - 2⁵ = 123011321099 is a prime.

It is a super-2 number, since 2×123011321131² (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 = 123011321099 and 123011321108.

It is not an unprimeable number, because it can be changed into a prime (123011321231) 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, 16271866 + ... + 16279423.

It is an arithmetic number, because the mean of its divisors is an integer number (30760969050).

Almost surely, 2^123011321131 is an apocalyptic number.

123011321131 is a deficient number, since it is larger than the sum of its proper divisors (32555069).

123011321131 is an equidigital number, since it uses as much as digits as its factorization.

123011321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32555068.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 123011321131 its reverse (131123110321), we get a palindrome (254134431452).

The spelling of 123011321131 in words is "one hundred twenty-three billion, eleven million, three hundred twenty-one thousand, one hundred thirty-one".