403220401021 has 4 divisors (see below), whose sum is σ = 403461996700. Its totient is φ = 402978805344.

The previous prime is 403220400937. The next prime is 403220401027. The reversal of 403220401021 is 120104022304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 279132588900 + 124087812121 = 528330^2 + 352261^2 .

It is a cyclic number.

It is not a de Polignac number, because 403220401021 - 2⁷ = 403220400893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 403220401021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403220401027) 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, 120795336 + ... + 120798673.

It is an arithmetic number, because the mean of its divisors is an integer number (100865499175).

Almost surely, 2^403220401021 is an apocalyptic number.

It is an amenable number.

403220401021 is a deficient number, since it is larger than the sum of its proper divisors (241595679).

403220401021 is a wasteful number, since it uses less digits than its factorization.

403220401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241595678.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 403220401021 its reverse (120104022304), we get a palindrome (523324423325).

The spelling of 403220401021 in words is "four hundred three billion, two hundred twenty million, four hundred one thousand, twenty-one".