123013031021 has 8 divisors (see below), whose sum is σ = 127020332544. Its totient is φ = 119008175760.

The previous prime is 123013031003. The next prime is 123013031039. The reversal of 123013031021 is 120130310321.

It is an interprime number because it is at equal distance from previous prime (123013031003) and next prime (123013031039).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123013031021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123013031321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509081 + ... + 710766.

It is an arithmetic number, because the mean of its divisors is an integer number (15877541568).

Almost surely, 2^123013031021 is an apocalyptic number.

It is an amenable number.

123013031021 is a deficient number, since it is larger than the sum of its proper divisors (4007301523).

123013031021 is a wasteful number, since it uses less digits than its factorization.

123013031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223131.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 123013031021 its reverse (120130310321), we get a palindrome (243143341342).

The spelling of 123013031021 in words is "one hundred twenty-three billion, thirteen million, thirty-one thousand, twenty-one".