202020100101221 has 8 divisors (see below), whose sum is σ = 203908595901984. Its totient is φ = 200131612772560.

The previous prime is 202020100101187. The next prime is 202020100101229. The reversal of 202020100101221 is 122101001020202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202020100101221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202020100101196 and 202020100101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020100101229) 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, 52299926 + ... + 56029656.

It is an arithmetic number, because the mean of its divisors is an integer number (25488574487748).

Almost surely, 2^{202020100101221} is an apocalyptic number.

It is an amenable number.

202020100101221 is a deficient number, since it is larger than the sum of its proper divisors (1888495800763).

202020100101221 is a wasteful number, since it uses less digits than its factorization.

202020100101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236051.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202020100101221 its reverse (122101001020202), we get a palindrome (324121101121423).

The spelling of 202020100101221 in words is "two hundred two trillion, twenty billion, one hundred million, one hundred one thousand, two hundred twenty-one".