202200221001221 has 8 divisors (see below), whose sum is σ = 206147975949720. Its totient is φ = 198257379254272.

The previous prime is 202200221001113. The next prime is 202200221001277. The reversal of 202200221001221 is 122100122002202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24437065144996 + 177763155856225 = 4943386^2 + 13332785^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202200221001221 - 2⁴² = 197802174490117 is a prime.

It is a super-2 number, since 2×202200221001221² (a number of 29 digits) contains 22 as substring.

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 202200221001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202200221000221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1228217276 + ... + 1228381893.

It is an arithmetic number, because the mean of its divisors is an integer number (25768496993715).

Almost surely, 2^{202200221001221} is an apocalyptic number.

It is an amenable number.

202200221001221 is a deficient number, since it is larger than the sum of its proper divisors (3947754948499).

202200221001221 is a wasteful number, since it uses less digits than its factorization.

202200221001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456600775.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202200221001221 its reverse (122100122002202), we get a palindrome (324300343003423).

The spelling of 202200221001221 in words is "two hundred two trillion, two hundred billion, two hundred twenty-one million, one thousand, two hundred twenty-one".