122406312421 has 4 divisors (see below), whose sum is σ = 123299789292. Its totient is φ = 121512835552.

The previous prime is 122406312403. The next prime is 122406312433. The reversal of 122406312421 is 124213604221.

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 25365340225 + 97040972196 = 159265^2 + 311514^2 .

It is a cyclic number.

It is not a de Polignac number, because 122406312421 - 2⁷ = 122406312293 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 122406312421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122406312451) 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, 446738230 + ... + 446738503.

It is an arithmetic number, because the mean of its divisors is an integer number (30824947323).

Almost surely, 2^122406312421 is an apocalyptic number.

It is an amenable number.

122406312421 is a deficient number, since it is larger than the sum of its proper divisors (893476871).

122406312421 is an equidigital number, since it uses as much as digits as its factorization.

122406312421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893476870.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 122406312421 its reverse (124213604221), we get a palindrome (246619916642).

The spelling of 122406312421 in words is "one hundred twenty-two billion, four hundred six million, three hundred twelve thousand, four hundred twenty-one".