123021333002221 has 8 divisors (see below), whose sum is σ = 125342654918904. Its totient is φ = 120700017185280.

The previous prime is 123021333002177. The next prime is 123021333002263. The reversal of 123021333002221 is 122200333120321.

It can be written as a sum of positive squares in 4 ways, for example, as 14337476228196 + 108683856774025 = 3786486^2 + 10425155^2 .

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 123021333002221 - 2¹¹ = 123021333000173 is a prime.

It is a super-2 number, since 2×123021333002221² (a number of 29 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 (123021333002921) 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, 76594561 + ... + 78184201.

It is an arithmetic number, because the mean of its divisors is an integer number (15667831864863).

Almost surely, 2^{123021333002221} is an apocalyptic number.

It is an amenable number.

123021333002221 is a deficient number, since it is larger than the sum of its proper divisors (2321321916683).

123021333002221 is a wasteful number, since it uses less digits than its factorization.

123021333002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049871.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 123021333002221 its reverse (122200333120321), we get a palindrome (245221666122542).

The spelling of 123021333002221 in words is "one hundred twenty-three trillion, twenty-one billion, three hundred thirty-three million, two thousand, two hundred twenty-one".