202000002101221 has 4 divisors (see below), whose sum is σ = 212631581159200. Its totient is φ = 191368423043244.

The previous prime is 202000002101203. The next prime is 202000002101269. The reversal of 202000002101221 is 122101200000202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202000002101221 - 2¹¹ = 202000002099173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202000002101021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5315789528961 + ... + 5315789528998.

It is an arithmetic number, because the mean of its divisors is an integer number (53157895289800).

Almost surely, 2^{202000002101221} is an apocalyptic number.

It is an amenable number.

202000002101221 is a deficient number, since it is larger than the sum of its proper divisors (10631579057979).

202000002101221 is a wasteful number, since it uses less digits than its factorization.

202000002101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10631579057978.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202000002101221 its reverse (122101200000202), we get a palindrome (324101202101423).

The spelling of 202000002101221 in words is "two hundred two trillion, two million, one hundred one thousand, two hundred twenty-one".