210202002001221 has 32 divisors (see below), whose sum is σ = 285697929686400. Its totient is φ = 137422987413504.

The previous prime is 210202002001219. The next prime is 210202002001249. The reversal of 210202002001221 is 122100200202012.

It is not a de Polignac number, because 210202002001221 - 2¹ = 210202002001219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210202002001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210202002002221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3546306841 + ... + 3546366113.

It is an arithmetic number, because the mean of its divisors is an integer number (8928060302700).

Almost surely, 2^{210202002001221} is an apocalyptic number.

It is an amenable number.

210202002001221 is a deficient number, since it is larger than the sum of its proper divisors (75495927685179).

210202002001221 is a wasteful number, since it uses less digits than its factorization.

210202002001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69925.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210202002001221 its reverse (122100200202012), we get a palindrome (332302202203233).

The spelling of 210202002001221 in words is "two hundred ten trillion, two hundred two billion, two million, one thousand, two hundred twenty-one".