201002221021 has 16 divisors (see below), whose sum is σ = 232250678784. Its totient is φ = 170393819904.

The previous prime is 201002221009. The next prime is 201002221039. The reversal of 201002221021 is 120122200102.

It is a happy number.

It is not a de Polignac number, because 201002221021 - 2⁵ = 201002220989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201002220992 and 201002221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201002222021) 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, 91815 + ... + 640651.

It is an arithmetic number, because the mean of its divisors is an integer number (14515667424).

Almost surely, 2^201002221021 is an apocalyptic number.

It is an amenable number.

201002221021 is a deficient number, since it is larger than the sum of its proper divisors (31248457763).

201002221021 is a wasteful number, since it uses less digits than its factorization.

201002221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549420.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201002221021 its reverse (120122200102), we get a palindrome (321124421123).

The spelling of 201002221021 in words is "two hundred one billion, two million, two hundred twenty-one thousand, twenty-one".