20202101100221 has 4 divisors (see below), whose sum is σ = 21265369579200. Its totient is φ = 19138832621244.

The previous prime is 20202101100217. The next prime is 20202101100263. The reversal of 20202101100221 is 12200110120202.

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 a cyclic number.

It is not a de Polignac number, because 20202101100221 - 2² = 20202101100217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20202101100196 and 20202101100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202101100211) 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, 531634239461 + ... + 531634239498.

It is an arithmetic number, because the mean of its divisors is an integer number (5316342394800).

Almost surely, 2^{20202101100221} is an apocalyptic number.

It is an amenable number.

20202101100221 is a deficient number, since it is larger than the sum of its proper divisors (1063268478979).

20202101100221 is a wasteful number, since it uses less digits than its factorization.

20202101100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063268478978.

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

Adding to 20202101100221 its reverse (12200110120202), we get a palindrome (32402211220423).

The spelling of 20202101100221 in words is "twenty trillion, two hundred two billion, one hundred one million, one hundred thousand, two hundred twenty-one".