21112222222222 has 32 divisors (see below), whose sum is σ = 33094274830848. Its totient is φ = 10082163781536.

The previous prime is 21112222222219. The next prime is 21112222222309. The reversal of 21112222222222 is 22222222221112.

It is a nude number because it is divisible by every one of its digits.

21112222222222 is a modest number, since divided by 2222222 gives 2111222 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272120628 + ... + 272198200.

It is an arithmetic number, because the mean of its divisors is an integer number (1034196088464).

Almost surely, 2^{21112222222222} is an apocalyptic number.

21112222222222 is a deficient number, since it is larger than the sum of its proper divisors (11982052608626).

21112222222222 is a wasteful number, since it uses less digits than its factorization.

21112222222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86304.

The product of its digits is 2048, while the sum is 25.

Adding to 21112222222222 its reverse (22222222221112), we get a palindrome (43334444443334).

The spelling of 21112222222222 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-two".