123021203131 has 4 divisors (see below), whose sum is σ = 123028735000. Its totient is φ = 123013671264.

The previous prime is 123021203113. The next prime is 123021203141. The reversal of 123021203131 is 131302120321.

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 123021203131 - 2⁵ = 123021203099 is a prime.

It is a super-2 number, since 2×123021203131² (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 = 123021203099 and 123021203108.

It is not an unprimeable number, because it can be changed into a prime (123021203141) 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, 3741381 + ... + 3774118.

It is an arithmetic number, because the mean of its divisors is an integer number (30757183750).

Almost surely, 2^123021203131 is an apocalyptic number.

123021203131 is a deficient number, since it is larger than the sum of its proper divisors (7531869).

123021203131 is an equidigital number, since it uses as much as digits as its factorization.

123021203131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7531868.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123021203131 its reverse (131302120321), we get a palindrome (254323323452).

The spelling of 123021203131 in words is "one hundred twenty-three billion, twenty-one million, two hundred three thousand, one hundred thirty-one".