201112102220021 has 4 divisors (see below), whose sum is σ = 204113775387552. Its totient is φ = 198110429052492.

The previous prime is 201112102219939. The next prime is 201112102220063. The reversal of 201112102220021 is 120022201211102.

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 201112102220021 - 2²² = 201112098025717 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 (201112102220321) 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, 1500836583665 + ... + 1500836583798.

It is an arithmetic number, because the mean of its divisors is an integer number (51028443846888).

Almost surely, 2^{201112102220021} is an apocalyptic number.

It is an amenable number.

201112102220021 is a deficient number, since it is larger than the sum of its proper divisors (3001673167531).

201112102220021 is an equidigital number, since it uses as much as digits as its factorization.

201112102220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001673167530.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201112102220021 its reverse (120022201211102), we get a palindrome (321134303431123).

The spelling of 201112102220021 in words is "two hundred one trillion, one hundred twelve billion, one hundred two million, two hundred twenty thousand, twenty-one".