122020420421 has 16 divisors (see below), whose sum is σ = 127086062400. Its totient is φ = 117084739200.

The previous prime is 122020420397. The next prime is 122020420439. The reversal of 122020420421 is 124024020221.

It is a cyclic number.

It is not a de Polignac number, because 122020420421 - 2¹⁰ = 122020419397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122020420393 and 122020420402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122020420121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342065 + ... + 600873.

It is an arithmetic number, because the mean of its divisors is an integer number (7942878900).

Almost surely, 2^122020420421 is an apocalyptic number.

It is an amenable number.

122020420421 is a deficient number, since it is larger than the sum of its proper divisors (5065641979).

122020420421 is a wasteful number, since it uses less digits than its factorization.

122020420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259060.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 122020420421 its reverse (124024020221), we get a palindrome (246044440642).

The spelling of 122020420421 in words is "one hundred twenty-two billion, twenty million, four hundred twenty thousand, four hundred twenty-one".