421002430121 has 48 divisors (see below), whose sum is σ = 536144918400. Its totient is φ = 327609660672.

The previous prime is 421002430097. The next prime is 421002430151. The reversal of 421002430121 is 121034200124.

It is not a de Polignac number, because 421002430121 - 2¹⁸ = 421002167977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421002430093 and 421002430102.

It is not an unprimeable number, because it can be changed into a prime (421002430151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16681250 + ... + 16706468.

It is an arithmetic number, because the mean of its divisors is an integer number (11169685800).

Almost surely, 2^421002430121 is an apocalyptic number.

It is an amenable number.

421002430121 is a deficient number, since it is larger than the sum of its proper divisors (115142488279).

421002430121 is a wasteful number, since it uses less digits than its factorization.

421002430121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25678 (or 25671 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 421002430121 its reverse (121034200124), we get a palindrome (542036630245).

The spelling of 421002430121 in words is "four hundred twenty-one billion, two million, four hundred thirty thousand, one hundred twenty-one".