123021301203021 has 12 divisors (see below), whose sum is σ = 177616553216928. Its totient is φ = 75705416124624.

The previous prime is 123021301203019. The next prime is 123021301203029. The reversal of 123021301203021 is 120302103120321.

It is not a de Polignac number, because 123021301203021 - 2¹ = 123021301203019 is a prime.

It is a super-2 number, since 2×123021301203021² (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 (123021301203029) 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 11 ways as a sum of consecutive naturals, for example, 121322781745 + ... + 121322782758.

It is an arithmetic number, because the mean of its divisors is an integer number (14801379434744).

Almost surely, 2^{123021301203021} is an apocalyptic number.

It is an amenable number.

123021301203021 is a deficient number, since it is larger than the sum of its proper divisors (54595252013907).

123021301203021 is a wasteful number, since it uses less digits than its factorization.

123021301203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242645564532 (or 242645564519 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123021301203021 its reverse (120302103120321), we get a palindrome (243323404323342).

The spelling of 123021301203021 in words is "one hundred twenty-three trillion, twenty-one billion, three hundred one million, two hundred three thousand, twenty-one".