202200212121021 has 8 divisors (see below), whose sum is σ = 299555869808960. Its totient is φ = 134800141413996.

The previous prime is 202200212120987. The next prime is 202200212121023. The reversal of 202200212121021 is 120121212002202.

It is a happy number.

202200212121021 is a `hidden beast` number, since 2 + 0 + 220 + 0 + 212 + 1 + 210 + 21 = 666.

It is not a de Polignac number, because 202200212121021 - 2¹⁵ = 202200212088253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202200212120985 and 202200212121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202200212121023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3744448372585 + ... + 3744448372638.

It is an arithmetic number, because the mean of its divisors is an integer number (37444483726120).

Almost surely, 2^{202200212121021} is an apocalyptic number.

It is an amenable number.

202200212121021 is a deficient number, since it is larger than the sum of its proper divisors (97355657687939).

202200212121021 is an equidigital number, since it uses as much as digits as its factorization.

202200212121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7488896745232 (or 7488896745226 counting only the distinct ones).

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

Adding to 202200212121021 its reverse (120121212002202), we get a palindrome (322321424123223).

The spelling of 202200212121021 in words is "two hundred two trillion, two hundred billion, two hundred twelve million, one hundred twenty-one thousand, twenty-one".