123020000031 has 16 divisors (see below), whose sum is σ = 166091917824. Its totient is φ = 80984527104.

The previous prime is 123019999987. The next prime is 123020000041. The reversal of 123020000031 is 130000020321.

It is a happy number.

It is not a de Polignac number, because 123020000031 - 2¹⁹ = 123019475743 is a prime.

It is a super-2 number, since 2×123020000031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123019999971 and 123020000016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123020000041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348231 + ... + 606056.

It is an arithmetic number, because the mean of its divisors is an integer number (10380744864).

Almost surely, 2^123020000031 is an apocalyptic number.

123020000031 is a deficient number, since it is larger than the sum of its proper divisors (43071917793).

123020000031 is an equidigital number, since it uses as much as digits as its factorization.

123020000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954830.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 123020000031 its reverse (130000020321), we get a palindrome (253020020352).

The spelling of 123020000031 in words is "one hundred twenty-three billion, twenty million, thirty-one", and thus it is an aban number.