2021210212201 has 4 divisors (see below), whose sum is σ = 2090907116100. Its totient is φ = 1951513308304.

The previous prime is 2021210212129. The next prime is 2021210212291. The reversal of 2021210212201 is 1022120121202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 882509936400 + 1138700275801 = 939420^2 + 1067099^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021210212201 - 2¹⁵ = 2021210179433 is a prime.

It is a super-2 number, since 2×2021210212201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021210212291) 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, 34848451906 + ... + 34848451963.

It is an arithmetic number, because the mean of its divisors is an integer number (522726779025).

Almost surely, 2^{2021210212201} is an apocalyptic number.

It is an amenable number.

2021210212201 is a deficient number, since it is larger than the sum of its proper divisors (69696903899).

2021210212201 is an equidigital number, since it uses as much as digits as its factorization.

2021210212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69696903898.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021210212201 its reverse (1022120121202), we get a palindrome (3043330333403).

Subtracting from 2021210212201 its reverse (1022120121202), we obtain a palindrome (999090090999).

The spelling of 2021210212201 in words is "two trillion, twenty-one billion, two hundred ten million, two hundred twelve thousand, two hundred one".