402342443021 has 4 divisors (see below), whose sum is σ = 402347841792. Its totient is φ = 402337044252.

The previous prime is 402342443011. The next prime is 402342443039. The reversal of 402342443021 is 120344243204.

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 a cyclic number.

It is not a de Polignac number, because 402342443021 - 2¹⁴ = 402342426637 is a prime.

It is a super-2 number, since 2×402342443021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402342443011) 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, 2586011 + ... + 2737176.

It is an arithmetic number, because the mean of its divisors is an integer number (100586960448).

Almost surely, 2^402342443021 is an apocalyptic number.

It is an amenable number.

402342443021 is a deficient number, since it is larger than the sum of its proper divisors (5398771).

402342443021 is an equidigital number, since it uses as much as digits as its factorization.

402342443021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5398770.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 402342443021 its reverse (120344243204), we get a palindrome (522686686225).

The spelling of 402342443021 in words is "four hundred two billion, three hundred forty-two million, four hundred forty-three thousand, twenty-one".