123012020231 has 2 divisors, whose sum is σ = 123012020232. Its totient is φ = 123012020230.

The previous prime is 123012020227. The next prime is 123012020293. The reversal of 123012020231 is 132020210321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123012020231 - 2² = 123012020227 is a prime.

It is a super-2 number, since 2×123012020231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123012028231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506010115 + 61506010116.

It is an arithmetic number, because the mean of its divisors is an integer number (61506010116).

Almost surely, 2^123012020231 is an apocalyptic number.

123012020231 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012020231 is an equidigital number, since it uses as much as digits as its factorization.

123012020231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 123012020231 its reverse (132020210321), we get a palindrome (255032230552).

The spelling of 123012020231 in words is "one hundred twenty-three billion, twelve million, twenty thousand, two hundred thirty-one".