202121110022201 has 4 divisors (see below), whose sum is σ = 203909792411892. Its totient is φ = 200332427632512.

The previous prime is 202121110022093. The next prime is 202121110022213. The reversal of 202121110022201 is 102220011121202.

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 77849917027600 + 124271192994601 = 8823260^2 + 11147699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202121110022201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202121110022201.

It is not an unprimeable number, because it can be changed into a prime (202121110022701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 894341194676 + ... + 894341194901.

It is an arithmetic number, because the mean of its divisors is an integer number (50977448102973).

Almost surely, 2^{202121110022201} is an apocalyptic number.

It is an amenable number.

202121110022201 is a deficient number, since it is larger than the sum of its proper divisors (1788682389691).

202121110022201 is a wasteful number, since it uses less digits than its factorization.

202121110022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788682389690.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202121110022201 its reverse (102220011121202), we get a palindrome (304341121143403).

The spelling of 202121110022201 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred ten million, twenty-two thousand, two hundred one".