201010222220221 has 4 divisors (see below), whose sum is σ = 202290542107132. Its totient is φ = 199729902333312.

The previous prime is 201010222220167. The next prime is 201010222220231. The reversal of 201010222220221 is 122022222010102.

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 124461914062500 + 76548308157721 = 11156250^2 + 8749189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201010222220221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201010222220231) 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, 640159943220 + ... + 640159943533.

It is an arithmetic number, because the mean of its divisors is an integer number (50572635526783).

Almost surely, 2^{201010222220221} is an apocalyptic number.

It is an amenable number.

201010222220221 is a deficient number, since it is larger than the sum of its proper divisors (1280319886911).

201010222220221 is a wasteful number, since it uses less digits than its factorization.

201010222220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280319886910.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 201010222220221 its reverse (122022222010102), we get a palindrome (323032444230323).

The spelling of 201010222220221 in words is "two hundred one trillion, ten billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".