201220002021 has 16 divisors (see below), whose sum is σ = 276085929600. Its totient is φ = 130264619328.

The previous prime is 201220001971. The next prime is 201220002077. The reversal of 201220002021 is 120200022102.

It is not a de Polignac number, because 201220002021 - 2²⁶ = 201152893157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201220001988 and 201220002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220002091) 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, 1724241 + ... + 1837238.

It is an arithmetic number, because the mean of its divisors is an integer number (17255370600).

Almost surely, 2^201220002021 is an apocalyptic number.

It is an amenable number.

201220002021 is a deficient number, since it is larger than the sum of its proper divisors (74865927579).

201220002021 is a wasteful number, since it uses less digits than its factorization.

201220002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3562028.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 201220002021 its reverse (120200022102), we get a palindrome (321420024123).

The spelling of 201220002021 in words is "two hundred one billion, two hundred twenty million, two thousand, twenty-one".