202101221000221 has 16 divisors (see below), whose sum is σ = 204429972298176. Its totient is φ = 199778924800000.

The previous prime is 202101221000219. The next prime is 202101221000243. The reversal of 202101221000221 is 122000122101202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 202101221000221 - 2¹ = 202101221000219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202101221000195 and 202101221000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202101221000251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1748661366 + ... + 1748776936.

It is an arithmetic number, because the mean of its divisors is an integer number (12776873268636).

Almost surely, 2^{202101221000221} is an apocalyptic number.

It is an amenable number.

202101221000221 is a deficient number, since it is larger than the sum of its proper divisors (2328751297955).

202101221000221 is a wasteful number, since it uses less digits than its factorization.

202101221000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143324.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202101221000221 its reverse (122000122101202), we get a palindrome (324101343101423).

The spelling of 202101221000221 in words is "two hundred two trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty-one", and thus it is an aban number.