20100222111 has 4 divisors (see below), whose sum is σ = 26800296152. Its totient is φ = 13400148072.

The previous prime is 20100222083. The next prime is 20100222167. The reversal of 20100222111 is 11122200102.

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

It is not a de Polignac number, because 20100222111 - 2⁶ = 20100222047 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 (20100222211) 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, 3350037016 + ... + 3350037021.

It is an arithmetic number, because the mean of its divisors is an integer number (6700074038).

Almost surely, 2^20100222111 is an apocalyptic number.

20100222111 is a deficient number, since it is larger than the sum of its proper divisors (6700074041).

20100222111 is an equidigital number, since it uses as much as digits as its factorization.

20100222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700074040.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20100222111 its reverse (11122200102), we get a palindrome (31222422213).

The spelling of 20100222111 in words is "twenty billion, one hundred million, two hundred twenty-two thousand, one hundred eleven".