122105043421 has 4 divisors (see below), whose sum is σ = 129287693052. Its totient is φ = 114922393792.

The previous prime is 122105043407. The next prime is 122105043443. The reversal of 122105043421 is 124340501221.

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 45887637796 + 76217405625 = 214214^2 + 276075^2 .

It is a cyclic number.

It is not a de Polignac number, because 122105043421 - 2⁷ = 122105043293 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 (122105043451) 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, 3591324790 + ... + 3591324823.

It is an arithmetic number, because the mean of its divisors is an integer number (32321923263).

Almost surely, 2^122105043421 is an apocalyptic number.

It is an amenable number.

122105043421 is a deficient number, since it is larger than the sum of its proper divisors (7182649631).

122105043421 is an equidigital number, since it uses as much as digits as its factorization.

122105043421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182649630.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 122105043421 its reverse (124340501221), we get a palindrome (246445544642).

The spelling of 122105043421 in words is "one hundred twenty-two billion, one hundred five million, forty-three thousand, four hundred twenty-one".