202021200112221 has 64 divisors (see below), whose sum is σ = 349329571061760. Its totient is φ = 112982718818880.

The previous prime is 202021200112219. The next prime is 202021200112229. The reversal of 202021200112221 is 122211002120202.

It is a happy number.

It is not a de Polignac number, because 202021200112221 - 2¹ = 202021200112219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202021200112194 and 202021200112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021200112229) 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 63 ways as a sum of consecutive naturals, for example, 730586230 + ... + 730862696.

It is an arithmetic number, because the mean of its divisors is an integer number (5458274547840).

Almost surely, 2^{202021200112221} is an apocalyptic number.

202021200112221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202021200112221 is a deficient number, since it is larger than the sum of its proper divisors (147308370949539).

202021200112221 is a wasteful number, since it uses less digits than its factorization.

202021200112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358791 (or 358785 counting only the distinct ones).

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

Adding to 202021200112221 its reverse (122211002120202), we get a palindrome (324232202232423).

The spelling of 202021200112221 in words is "two hundred two trillion, twenty-one billion, two hundred million, one hundred twelve thousand, two hundred twenty-one".