420221100002431 has 32 divisors (see below), whose sum is σ = 517386606184448. Its totient is φ = 332359604922240.

The previous prime is 420221100002339. The next prime is 420221100002453. The reversal of 420221100002431 is 134200001122024.

It is not a de Polignac number, because 420221100002431 - 2²⁹ = 420220563131519 is a prime.

It is a super-2 number, since 2×420221100002431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420221100002471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2805757510 + ... + 2805907276.

It is an arithmetic number, because the mean of its divisors is an integer number (16168331443264).

Almost surely, 2^{420221100002431} is an apocalyptic number.

420221100002431 is a deficient number, since it is larger than the sum of its proper divisors (97165506182017).

420221100002431 is a wasteful number, since it uses less digits than its factorization.

420221100002431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160991.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 420221100002431 its reverse (134200001122024), we get a palindrome (554421101124455).

The spelling of 420221100002431 in words is "four hundred twenty trillion, two hundred twenty-one billion, one hundred million, two thousand, four hundred thirty-one".