201002102021 has 32 divisors (see below), whose sum is σ = 241695387648. Its totient is φ = 163429643520.

The previous prime is 201002101999. The next prime is 201002102053. The reversal of 201002102021 is 120201200102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201002102021 - 2²⁶ = 200934993157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201002101993 and 201002102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201002102221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50974976 + ... + 50978918.

It is an arithmetic number, because the mean of its divisors is an integer number (7552980864).

Almost surely, 2^201002102021 is an apocalyptic number.

It is an amenable number.

201002102021 is a deficient number, since it is larger than the sum of its proper divisors (40693285627).

201002102021 is a wasteful number, since it uses less digits than its factorization.

201002102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6521.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 201002102021 its reverse (120201200102), we get a palindrome (321203302123).

The spelling of 201002102021 in words is "two hundred one billion, two million, one hundred two thousand, twenty-one".