202102221220111 has 4 divisors (see below), whose sum is σ = 202103117245224. Its totient is φ = 202101325195000.

The previous prime is 202102221220079. The next prime is 202102221220171. The reversal of 202102221220111 is 111022122201202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202102221220111 - 2⁵ = 202102221220079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102221220171) 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, 447674140 + ... + 448125361.

It is an arithmetic number, because the mean of its divisors is an integer number (50525779311306).

Almost surely, 2^{202102221220111} is an apocalyptic number.

202102221220111 is a deficient number, since it is larger than the sum of its proper divisors (896025113).

202102221220111 is an equidigital number, since it uses as much as digits as its factorization.

202102221220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896025112.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202102221220111 its reverse (111022122201202), we get a palindrome (313124343421313).

The spelling of 202102221220111 in words is "two hundred two trillion, one hundred two billion, two hundred twenty-one million, two hundred twenty thousand, one hundred eleven".