202120002112221 has 24 divisors (see below), whose sum is σ = 302020029792000. Its totient is φ = 130099526579232.

The previous prime is 202120002112213. The next prime is 202120002112229. The reversal of 202120002112221 is 122211200021202.

It is a happy number.

202120002112221 is a `hidden beast` number, since 20 + 212 + 0 + 0 + 0 + 211 + 2 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (202120002112213) and next prime (202120002112229).

It is not a de Polignac number, because 202120002112221 - 2³ = 202120002112213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202120002112194 and 202120002112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202120002112229) 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 23 ways as a sum of consecutive naturals, for example, 48518460 + ... + 52519338.

It is an arithmetic number, because the mean of its divisors is an integer number (12584167908000).

Almost surely, 2^{202120002112221} is an apocalyptic number.

It is an amenable number.

202120002112221 is a deficient number, since it is larger than the sum of its proper divisors (99900027679779).

202120002112221 is a wasteful number, since it uses less digits than its factorization.

202120002112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194473 (or 4194470 counting only the distinct ones).

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

Adding to 202120002112221 its reverse (122211200021202), we get a palindrome (324331202133423).

The spelling of 202120002112221 in words is "two hundred two trillion, one hundred twenty billion, two million, one hundred twelve thousand, two hundred twenty-one".