122120042042421 has 24 divisors (see below), whose sum is σ = 180063232995360. Its totient is φ = 79734662875296.

The previous prime is 122120042042417. The next prime is 122120042042459. The reversal of 122120042042421 is 124240240021221.

122120042042421 is a `hidden beast` number, since 1 + 2 + 212 + 0 + 0 + 4 + 2 + 0 + 424 + 21 = 666.

It is not a de Polignac number, because 122120042042421 - 2² = 122120042042417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122120042044421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 585215911 + ... + 585424548.

It is an arithmetic number, because the mean of its divisors is an integer number (7502634708140).

Almost surely, 2^{122120042042421} is an apocalyptic number.

It is an amenable number.

122120042042421 is a deficient number, since it is larger than the sum of its proper divisors (57943190952939).

122120042042421 is a wasteful number, since it uses less digits than its factorization.

122120042042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170640705 (or 1170640702 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 122120042042421 its reverse (124240240021221), we get a palindrome (246360282063642).

The spelling of 122120042042421 in words is "one hundred twenty-two trillion, one hundred twenty billion, forty-two million, forty-two thousand, four hundred twenty-one".