420020233221 has 4 divisors (see below), whose sum is σ = 560026977632. Its totient is φ = 280013488812.

The previous prime is 420020233219. The next prime is 420020233319. The reversal of 420020233221 is 122332020024.

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 not a de Polignac number, because 420020233221 - 2¹ = 420020233219 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 (420020233621) 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, 70003372201 + ... + 70003372206.

It is an arithmetic number, because the mean of its divisors is an integer number (140006744408).

Almost surely, 2^420020233221 is an apocalyptic number.

It is an amenable number.

420020233221 is a deficient number, since it is larger than the sum of its proper divisors (140006744411).

420020233221 is a wasteful number, since it uses less digits than its factorization.

420020233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140006744410.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 420020233221 its reverse (122332020024), we get a palindrome (542352253245).

The spelling of 420020233221 in words is "four hundred twenty billion, twenty million, two hundred thirty-three thousand, two hundred twenty-one".