123132434221 has 4 divisors (see below), whose sum is σ = 123276113532. Its totient is φ = 122988754912.

The previous prime is 123132434213. The next prime is 123132434251. The reversal of 123132434221 is 122434231321.

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 117091258596 + 6041175625 = 342186^2 + 77725^2 .

It is a cyclic number.

It is not a de Polignac number, because 123132434221 - 2³ = 123132434213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123132434221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123132434251) 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, 71838370 + ... + 71840083.

It is an arithmetic number, because the mean of its divisors is an integer number (30819028383).

Almost surely, 2^123132434221 is an apocalyptic number.

It is an amenable number.

123132434221 is a deficient number, since it is larger than the sum of its proper divisors (143679311).

123132434221 is an equidigital number, since it uses as much as digits as its factorization.

123132434221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143679310.

The product of its digits is 6912, while the sum is 28.

Adding to 123132434221 its reverse (122434231321), we get a palindrome (245566665542).

The spelling of 123132434221 in words is "one hundred twenty-three billion, one hundred thirty-two million, four hundred thirty-four thousand, two hundred twenty-one".