402403022021 has 16 divisors (see below), whose sum is σ = 540289373568. Its totient is φ = 289440734400.

The previous prime is 402403021991. The next prime is 402403022117. The reversal of 402403022021 is 120220304204.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402403022021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402403021984 and 402403022002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402403022321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200999510 + ... + 201001511.

It is an arithmetic number, because the mean of its divisors is an integer number (33768085848).

Almost surely, 2^402403022021 is an apocalyptic number.

It is an amenable number.

402403022021 is a deficient number, since it is larger than the sum of its proper divisors (137886351547).

402403022021 is a wasteful number, since it uses less digits than its factorization.

402403022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402001052.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 402403022021 its reverse (120220304204), we get a palindrome (522623326225).

The spelling of 402403022021 in words is "four hundred two billion, four hundred three million, twenty-two thousand, twenty-one".