202000002001221 has 4 divisors (see below), whose sum is σ = 269333336001632. Its totient is φ = 134666668000812.

The previous prime is 202000002001051. The next prime is 202000002001229. The reversal of 202000002001221 is 122100200000202.

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 not a de Polignac number, because 202000002001221 - 2³⁰ = 201998928259397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202000002001197 and 202000002001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202000002001229) 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, 33666667000201 + ... + 33666667000206.

It is an arithmetic number, because the mean of its divisors is an integer number (67333334000408).

Almost surely, 2^{202000002001221} is an apocalyptic number.

It is an amenable number.

202000002001221 is a deficient number, since it is larger than the sum of its proper divisors (67333334000411).

202000002001221 is an equidigital number, since it uses as much as digits as its factorization.

202000002001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67333334000410.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202000002001221 its reverse (122100200000202), we get a palindrome (324100202001423).

The spelling of 202000002001221 in words is "two hundred two trillion, two million, one thousand, two hundred twenty-one".