421421000013221 has 16 divisors (see below), whose sum is σ = 480536241292800. Its totient is φ = 366119973043968.

The previous prime is 421421000013193. The next prime is 421421000013271. The reversal of 421421000013221 is 122310000124124.

It is not a de Polignac number, because 421421000013221 - 2³⁰ = 421419926271397 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 (421421000013271) 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, 54675920 + ... + 61905558.

It is an arithmetic number, because the mean of its divisors is an integer number (30033515080800).

Almost surely, 2^{421421000013221} is an apocalyptic number.

It is an amenable number.

421421000013221 is a deficient number, since it is larger than the sum of its proper divisors (59115241279579).

421421000013221 is a wasteful number, since it uses less digits than its factorization.

421421000013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7493428.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 421421000013221 its reverse (122310000124124), we get a palindrome (543731000137345).

The spelling of 421421000013221 in words is "four hundred twenty-one trillion, four hundred twenty-one billion, thirteen thousand, two hundred twenty-one".