123244532133221 has 4 divisors (see below), whose sum is σ = 123497600988192. Its totient is φ = 122991463278252.

The previous prime is 123244532133199. The next prime is 123244532133223. The reversal of 123244532133221 is 122331235442321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123244532133221 - 2¹⁴ = 123244532116837 is a prime.

It is a super-2 number, since 2×123244532133221² (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 (123244532133223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126534426755 + ... + 126534427728.

It is an arithmetic number, because the mean of its divisors is an integer number (30874400247048).

Almost surely, 2^{123244532133221} is an apocalyptic number.

It is an amenable number.

123244532133221 is a deficient number, since it is larger than the sum of its proper divisors (253068854971).

123244532133221 is an equidigital number, since it uses as much as digits as its factorization.

123244532133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253068854970.

The product of its digits is 207360, while the sum is 38.

Adding to 123244532133221 its reverse (122331235442321), we get a palindrome (245575767575542).

The spelling of 123244532133221 in words is "one hundred twenty-three trillion, two hundred forty-four billion, five hundred thirty-two million, one hundred thirty-three thousand, two hundred twenty-one".