202121202210201 has 24 divisors (see below), whose sum is σ = 316666216385064. Its totient is φ = 123727947786240.

The previous prime is 202121202210181. The next prime is 202121202210203. The reversal of 202121202210201 is 102012202121202.

It is a happy number.

202121202210201 is a `hidden beast` number, since 20 + 21 + 212 + 0 + 2 + 210 + 201 = 666.

202121202210201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 51027077768976 + 151094124441225 = 7143324^2 + 12292035^2 .

It is not a de Polignac number, because 202121202210201 - 2⁷ = 202121202210073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (202121202210203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16110403596 + ... + 16110416141.

It is an arithmetic number, because the mean of its divisors is an integer number (13194425682711).

Almost surely, 2^{202121202210201} is an apocalyptic number.

It is an amenable number.

202121202210201 is a deficient number, since it is larger than the sum of its proper divisors (114545014174863).

202121202210201 is a wasteful number, since it uses less digits than its factorization.

202121202210201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32220819801 (or 32220819798 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 202121202210201 its reverse (102012202121202), we get a palindrome (304133404331403).

The spelling of 202121202210201 in words is "two hundred two trillion, one hundred twenty-one billion, two hundred two million, two hundred ten thousand, two hundred one".