202102100120221 has 8 divisors (see below), whose sum is σ = 230996277408960. Its totient is φ = 173213535006528.

The previous prime is 202102100120159. The next prime is 202102100120287. The reversal of 202102100120221 is 122021001201202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202102100120221 - 2¹⁵ = 202102100087453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202102100120195 and 202102100120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102100120621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1402966591 + ... + 1403110636.

It is an arithmetic number, because the mean of its divisors is an integer number (28874534676120).

Almost surely, 2^{202102100120221} is an apocalyptic number.

It is an amenable number.

202102100120221 is a deficient number, since it is larger than the sum of its proper divisors (28894177288739).

202102100120221 is a wasteful number, since it uses less digits than its factorization.

202102100120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806087523.

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

Adding to 202102100120221 its reverse (122021001201202), we get a palindrome (324123101321423).

The spelling of 202102100120221 in words is "two hundred two trillion, one hundred two billion, one hundred million, one hundred twenty thousand, two hundred twenty-one".