123030020831 has 2 divisors, whose sum is σ = 123030020832. Its totient is φ = 123030020830.

The previous prime is 123030020809. The next prime is 123030020879. The reversal of 123030020831 is 138020030321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123030020831 is a prime.

It is a super-2 number, since 2×123030020831² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123030020797 and 123030020806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123030020891) 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 as a sum of consecutive naturals, namely, 61515010415 + 61515010416.

It is an arithmetic number, because the mean of its divisors is an integer number (61515010416).

Almost surely, 2^123030020831 is an apocalyptic number.

123030020831 is a deficient number, since it is larger than the sum of its proper divisors (1).

123030020831 is an equidigital number, since it uses as much as digits as its factorization.

123030020831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The spelling of 123030020831 in words is "one hundred twenty-three billion, thirty million, twenty thousand, eight hundred thirty-one".