420022431021 has 16 divisors (see below), whose sum is σ = 585305210880. Its totient is φ = 267415893360.

The previous prime is 420022430983. The next prime is 420022431029. The reversal of 420022431021 is 120134220024.

It is not a de Polignac number, because 420022431021 - 2³⁴ = 402842561837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420022431029) 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, 4779981 + ... + 4867058.

It is an arithmetic number, because the mean of its divisors is an integer number (36581575680).

Almost surely, 2^420022431021 is an apocalyptic number.

It is an amenable number.

420022431021 is a deficient number, since it is larger than the sum of its proper divisors (165282779859).

420022431021 is a wasteful number, since it uses less digits than its factorization.

420022431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9647696.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 420022431021 its reverse (120134220024), we get a palindrome (540156651045).

The spelling of 420022431021 in words is "four hundred twenty billion, twenty-two million, four hundred thirty-one thousand, twenty-one".