421024024021 has 4 divisors (see below), whose sum is σ = 443183183200. Its totient is φ = 398864864844.

The previous prime is 421024024009. The next prime is 421024024033. The reversal of 421024024021 is 120420420124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (421024024009) and next prime (421024024033).

It is a cyclic number.

It is not a de Polignac number, because 421024024021 - 2²³ = 421015635413 is a prime.

It is a super-2 number, since 2×421024024021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421024023983 and 421024024001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421024024321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11079579561 + ... + 11079579598.

It is an arithmetic number, because the mean of its divisors is an integer number (110795795800).

Almost surely, 2^421024024021 is an apocalyptic number.

It is an amenable number.

421024024021 is a deficient number, since it is larger than the sum of its proper divisors (22159159179).

421024024021 is a wasteful number, since it uses less digits than its factorization.

421024024021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22159159178.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 421024024021 its reverse (120420420124), we get a palindrome (541444444145).

The spelling of 421024024021 in words is "four hundred twenty-one billion, twenty-four million, twenty-four thousand, twenty-one".