201002002021 has 4 divisors (see below), whose sum is σ = 201033283072. Its totient is φ = 200970720972.

The previous prime is 201002002001. The next prime is 201002002037. The reversal of 201002002021 is 120200200102.

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 201002002021 - 2²³ = 200993613413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201002001989 and 201002002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201002002001) 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, 15630885 + ... + 15643738.

It is an arithmetic number, because the mean of its divisors is an integer number (50258320768).

Almost surely, 2^201002002021 is an apocalyptic number.

It is an amenable number.

201002002021 is a deficient number, since it is larger than the sum of its proper divisors (31281051).

201002002021 is an equidigital number, since it uses as much as digits as its factorization.

201002002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31281050.

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

Adding to 201002002021 its reverse (120200200102), we get a palindrome (321202202123).

The spelling of 201002002021 in words is "two hundred one billion, two million, two thousand, twenty-one".