123031220023 has 4 divisors (see below), whose sum is σ = 126999969088. Its totient is φ = 119062470960.

The previous prime is 123031220003. The next prime is 123031220041. The reversal of 123031220023 is 320022130321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123031220023 is a prime.

It is a super-2 number, since 2×123031220023² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031220003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1984374486 + ... + 1984374547.

It is an arithmetic number, because the mean of its divisors is an integer number (31749992272).

Almost surely, 2^123031220023 is an apocalyptic number.

123031220023 is a deficient number, since it is larger than the sum of its proper divisors (3968749065).

123031220023 is an equidigital number, since it uses as much as digits as its factorization.

123031220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968749064.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 123031220023 its reverse (320022130321), we get a palindrome (443053350344).

The spelling of 123031220023 in words is "one hundred twenty-three billion, thirty-one million, two hundred twenty thousand, twenty-three".