421402410121 has 16 divisors (see below), whose sum is σ = 529395406848. Its totient is φ = 325858899600.

The previous prime is 421402410097. The next prime is 421402410133. The reversal of 421402410121 is 121014204124.

It is a cyclic number.

It is not a de Polignac number, because 421402410121 - 2⁷ = 421402409993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421402410092 and 421402410101.

It is not an unprimeable number, because it can be changed into a prime (421402410421) 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, 20878305 + ... + 20898478.

It is an arithmetic number, because the mean of its divisors is an integer number (33087212928).

Almost surely, 2^421402410121 is an apocalyptic number.

It is an amenable number.

421402410121 is a deficient number, since it is larger than the sum of its proper divisors (107992996727).

421402410121 is a wasteful number, since it uses less digits than its factorization.

421402410121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41776932.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 421402410121 its reverse (121014204124), we get a palindrome (542416614245).

The spelling of 421402410121 in words is "four hundred twenty-one billion, four hundred two million, four hundred ten thousand, one hundred twenty-one".