200402342021 has 4 divisors (see below), whose sum is σ = 229031248032. Its totient is φ = 171773436012.

The previous prime is 200402342009. The next prime is 200402342029. The reversal of 200402342021 is 120243204002.

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 200402342021 - 2³⁴ = 183222472837 is a prime.

It is a super-2 number, since 2×200402342021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200402341984 and 200402342002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200402342029) 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, 14314452995 + ... + 14314453008.

It is an arithmetic number, because the mean of its divisors is an integer number (57257812008).

Almost surely, 2^200402342021 is an apocalyptic number.

It is an amenable number.

200402342021 is a deficient number, since it is larger than the sum of its proper divisors (28628906011).

200402342021 is an equidigital number, since it uses as much as digits as its factorization.

200402342021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28628906010.

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

Adding to 200402342021 its reverse (120243204002), we get a palindrome (320645546023).

The spelling of 200402342021 in words is "two hundred billion, four hundred two million, three hundred forty-two thousand, twenty-one".