202110011221 has 4 divisors (see below), whose sum is σ = 202158611200. Its totient is φ = 202061411244.

The previous prime is 202110011219. The next prime is 202110011237. The reversal of 202110011221 is 122110011202.

202110011221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122110011202 = 2 ⋅61055005601.

It is a cyclic number.

It is not a de Polignac number, because 202110011221 - 2¹ = 202110011219 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 (202110071221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24293751 + ... + 24302068.

It is an arithmetic number, because the mean of its divisors is an integer number (50539652800).

Almost surely, 2^202110011221 is an apocalyptic number.

It is an amenable number.

202110011221 is a deficient number, since it is larger than the sum of its proper divisors (48599979).

202110011221 is an equidigital number, since it uses as much as digits as its factorization.

202110011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48599978.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 202110011221 its reverse (122110011202), we get a palindrome (324220022423).

The spelling of 202110011221 in words is "two hundred two billion, one hundred ten million, eleven thousand, two hundred twenty-one".