123402231212101 has 4 divisors (see below), whose sum is σ = 123755819267500. Its totient is φ = 123048643156704.

The previous prime is 123402231212093. The next prime is 123402231212119. The reversal of 123402231212101 is 101212132204321.

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 71876738340225 + 51525492871876 = 8478015^2 + 7178126^2 .

It is a cyclic number.

It is not a de Polignac number, because 123402231212101 - 2³ = 123402231212093 is a prime.

It is a super-2 number, since 2×123402231212101² (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 (123402231212131) 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 3 ways as a sum of consecutive naturals, for example, 176794027176 + ... + 176794027873.

It is an arithmetic number, because the mean of its divisors is an integer number (30938954816875).

Almost surely, 2^{123402231212101} is an apocalyptic number.

It is an amenable number.

123402231212101 is a deficient number, since it is larger than the sum of its proper divisors (353588055399).

123402231212101 is an equidigital number, since it uses as much as digits as its factorization.

123402231212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353588055398.

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

Adding to 123402231212101 its reverse (101212132204321), we get a palindrome (224614363416422).

The spelling of 123402231212101 in words is "one hundred twenty-three trillion, four hundred two billion, two hundred thirty-one million, two hundred twelve thousand, one hundred one".