402240301021 has 48 divisors (see below), whose sum is σ = 463834740096. Its totient is φ = 346658838912.

The previous prime is 402240301013. The next prime is 402240301033. The reversal of 402240301021 is 120103042204.

It is not a de Polignac number, because 402240301021 - 2³ = 402240301013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 402240301021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402240301051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 195927031 + ... + 195929083.

It is an arithmetic number, because the mean of its divisors is an integer number (9663223752).

Almost surely, 2^402240301021 is an apocalyptic number.

It is an amenable number.

402240301021 is a deficient number, since it is larger than the sum of its proper divisors (61594439075).

402240301021 is a wasteful number, since it uses less digits than its factorization.

402240301021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690 (or 2671 counting only the distinct ones).

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

Adding to 402240301021 its reverse (120103042204), we get a palindrome (522343343225).

The spelling of 402240301021 in words is "four hundred two billion, two hundred forty million, three hundred one thousand, twenty-one".