202002001221 has 32 divisors (see below), whose sum is σ = 283068720000. Its totient is φ = 127965858048.

The previous prime is 202002001217. The next prime is 202002001231. The reversal of 202002001221 is 122100200202.

It is not a de Polignac number, because 202002001221 - 2² = 202002001217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202002001197 and 202002001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202002001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1341486 + ... + 1484448.

It is an arithmetic number, because the mean of its divisors is an integer number (8845897500).

Almost surely, 2^202002001221 is an apocalyptic number.

It is an amenable number.

202002001221 is a deficient number, since it is larger than the sum of its proper divisors (81066718779).

202002001221 is a wasteful number, since it uses less digits than its factorization.

202002001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143253.

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

Adding to 202002001221 its reverse (122100200202), we get a palindrome (324102201423).

The spelling of 202002001221 in words is "two hundred two billion, two million, one thousand, two hundred twenty-one".