123030312003021 has 8 divisors (see below), whose sum is σ = 164044838084544. Its totient is φ = 82017996961760.

The previous prime is 123030312002989. The next prime is 123030312003043. The reversal of 123030312003021 is 120300213030321.

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

It is a cyclic number.

It is not a de Polignac number, because 123030312003021 - 2⁵ = 123030312002989 is a prime.

It is a super-2 number, since 2×123030312003021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123030312003091) 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, 552630225 + ... + 552852806.

It is an arithmetic number, because the mean of its divisors is an integer number (20505604760568).

Almost surely, 2^{123030312003021} is an apocalyptic number.

It is an amenable number.

123030312003021 is a deficient number, since it is larger than the sum of its proper divisors (41014526081523).

123030312003021 is a wasteful number, since it uses less digits than its factorization.

123030312003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105520131.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 123030312003021 its reverse (120300213030321), we get a palindrome (243330525033342).

The spelling of 123030312003021 in words is "one hundred twenty-three trillion, thirty billion, three hundred twelve million, three thousand, twenty-one".