210201121202221 has 4 divisors (see below), whose sum is σ = 210243646216512. Its totient is φ = 210158596187932.

The previous prime is 210201121202213. The next prime is 210201121202251. The reversal of 210201121202221 is 122202121102012.

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 210201121202221 - 2³ = 210201121202213 is a prime.

It is a super-2 number, since 2×210201121202221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210201121202251) 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, 21262499731 + ... + 21262509616.

It is an arithmetic number, because the mean of its divisors is an integer number (52560911554128).

Almost surely, 2^{210201121202221} is an apocalyptic number.

It is an amenable number.

210201121202221 is a deficient number, since it is larger than the sum of its proper divisors (42525014291).

210201121202221 is an equidigital number, since it uses as much as digits as its factorization.

210201121202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42525014290.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210201121202221 its reverse (122202121102012), we get a palindrome (332403242304233).

The spelling of 210201121202221 in words is "two hundred ten trillion, two hundred one billion, one hundred twenty-one million, two hundred two thousand, two hundred twenty-one".