123212321222101 has 4 divisors (see below), whose sum is σ = 123213128704972. Its totient is φ = 123211513739232.

The previous prime is 123212321222071. The next prime is 123212321222119. The reversal of 123212321222101 is 101222123212321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122019616970001 + 1192704252100 = 11046249^2 + 1092110^2 .

It is a cyclic number.

It is not a de Polignac number, because 123212321222101 - 2³³ = 123203731287509 is a prime.

It is a super-2 number, since 2×123212321222101² (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 (123212321222141) 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, 403512510 + ... + 403817743.

It is an arithmetic number, because the mean of its divisors is an integer number (30803282176243).

Almost surely, 2^{123212321222101} is an apocalyptic number.

It is an amenable number.

123212321222101 is a deficient number, since it is larger than the sum of its proper divisors (807482871).

123212321222101 is an equidigital number, since it uses as much as digits as its factorization.

123212321222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807482870.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 123212321222101 its reverse (101222123212321), we get a palindrome (224434444434422).

The spelling of 123212321222101 in words is "one hundred twenty-three trillion, two hundred twelve billion, three hundred twenty-one million, two hundred twenty-two thousand, one hundred one".