123162225421 has 4 divisors (see below), whose sum is σ = 123216412572. Its totient is φ = 123108038272.

The previous prime is 123162225367. The next prime is 123162225491. The reversal of 123162225421 is 124522261321.

It is a happy number.

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 101907792900 + 21254432521 = 319230^2 + 145789^2 .

It is a cyclic number.

It is not a de Polignac number, because 123162225421 - 2²¹ = 123160128269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123162225491) 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, 27090166 + ... + 27094711.

It is an arithmetic number, because the mean of its divisors is an integer number (30804103143).

Almost surely, 2^123162225421 is an apocalyptic number.

It is an amenable number.

123162225421 is a deficient number, since it is larger than the sum of its proper divisors (54187151).

123162225421 is an equidigital number, since it uses as much as digits as its factorization.

123162225421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54187150.

The product of its digits is 11520, while the sum is 31.

Adding to 123162225421 its reverse (124522261321), we get a palindrome (247684486742).

The spelling of 123162225421 in words is "one hundred twenty-three billion, one hundred sixty-two million, two hundred twenty-five thousand, four hundred twenty-one".