123221012000021 has 8 divisors (see below), whose sum is σ = 132699719792640. Its totient is φ = 113742328265712.

The previous prime is 123221011999991. The next prime is 123221012000041. The reversal of 123221012000021 is 120000210122321.

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 123221012000021 - 2⁴⁶ = 52852267822357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221012000041) 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, 5429420 + ... + 16610858.

It is an arithmetic number, because the mean of its divisors is an integer number (16587464974080).

Almost surely, 2^{123221012000021} is an apocalyptic number.

It is an amenable number.

123221012000021 is a deficient number, since it is larger than the sum of its proper divisors (9478707792619).

123221012000021 is a wasteful number, since it uses less digits than its factorization.

123221012000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12029155.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 123221012000021 its reverse (120000210122321), we get a palindrome (243221222122342).

The spelling of 123221012000021 in words is "one hundred twenty-three trillion, two hundred twenty-one billion, twelve million, twenty-one", and thus it is an aban number.