202100020220221 has 4 divisors (see below), whose sum is σ = 203988805456032. Its totient is φ = 200211234984412.

The previous prime is 202100020220207. The next prime is 202100020220237. The reversal of 202100020220221 is 122022020001202.

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 202100020220221 - 2³⁹ = 201550264406333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202100020220195 and 202100020220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202100020220321) 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, 944392617745 + ... + 944392617958.

It is an arithmetic number, because the mean of its divisors is an integer number (50997201364008).

Almost surely, 2^{202100020220221} is an apocalyptic number.

It is an amenable number.

202100020220221 is a deficient number, since it is larger than the sum of its proper divisors (1888785235811).

202100020220221 is a wasteful number, since it uses less digits than its factorization.

202100020220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888785235810.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 202100020220221 its reverse (122022020001202), we get a palindrome (324122040221423).

The spelling of 202100020220221 in words is "two hundred two trillion, one hundred billion, twenty million, two hundred twenty thousand, two hundred twenty-one".