200021002021 has 8 divisors (see below), whose sum is σ = 212914137600. Its totient is φ = 187364437920.

The previous prime is 200021002009. The next prime is 200021002039. The reversal of 200021002021 is 120200120002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200021002021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200021001989 and 200021002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021002091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59141125 + ... + 59144506.

It is an arithmetic number, because the mean of its divisors is an integer number (26614267200).

Almost surely, 2^200021002021 is an apocalyptic number.

It is an amenable number.

200021002021 is a deficient number, since it is larger than the sum of its proper divisors (12893135579).

200021002021 is a wasteful number, since it uses less digits than its factorization.

200021002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118285739.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 200021002021 its reverse (120200120002), we get a palindrome (320221122023).

The spelling of 200021002021 in words is "two hundred billion, twenty-one million, two thousand, twenty-one".