402234410021 has 4 divisors (see below), whose sum is σ = 404702105952. Its totient is φ = 399766714092.

The previous prime is 402234409937. The next prime is 402234410063. The reversal of 402234410021 is 120014432204.

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 402234410021 - 2¹⁰ = 402234408997 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 (402234419021) 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, 1233847721 + ... + 1233848046.

It is an arithmetic number, because the mean of its divisors is an integer number (101175526488).

Almost surely, 2^402234410021 is an apocalyptic number.

It is an amenable number.

402234410021 is a deficient number, since it is larger than the sum of its proper divisors (2467695931).

402234410021 is a wasteful number, since it uses less digits than its factorization.

402234410021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467695930.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 402234410021 its reverse (120014432204), we get a palindrome (522248842225).

The spelling of 402234410021 in words is "four hundred two billion, two hundred thirty-four million, four hundred ten thousand, twenty-one".