2122221111 has 4 divisors (see below), whose sum is σ = 2829628152. Its totient is φ = 1414814072.

The previous prime is 2122221083. The next prime is 2122221133. The reversal of 2122221111 is 1111222212.

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 2122221111 - 2⁷ = 2122220983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122221151) 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, 353703516 + ... + 353703521.

It is an arithmetic number, because the mean of its divisors is an integer number (707407038).

Almost surely, 2^2122221111 is an apocalyptic number.

2122221111 is a deficient number, since it is larger than the sum of its proper divisors (707407041).

2122221111 is an equidigital number, since it uses as much as digits as its factorization.

2122221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707407040.

The product of its digits is 32, while the sum is 15.

The square root of 2122221111 is about 46067.5711428332. The cubic root of 2122221111 is about 1285.0801346968.

Adding to 2122221111 its reverse (1111222212), we get a palindrome (3233443323).

The spelling of 2122221111 in words is "two billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred eleven".