112112211222221 has 4 divisors (see below), whose sum is σ = 128128241396832. Its totient is φ = 96096181047612.

The previous prime is 112112211222139. The next prime is 112112211222227. The reversal of 112112211222221 is 122222112211211.

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 112112211222221 - 2²² = 112112207027917 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 (112112211222227) 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, 8008015087295 + ... + 8008015087308.

It is an arithmetic number, because the mean of its divisors is an integer number (32032060349208).

Almost surely, 2^{112112211222221} is an apocalyptic number.

It is an amenable number.

112112211222221 is a deficient number, since it is larger than the sum of its proper divisors (16016030174611).

112112211222221 is an equidigital number, since it uses as much as digits as its factorization.

112112211222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16016030174610.

The product of its digits is 256, while the sum is 23.

Adding to 112112211222221 its reverse (122222112211211), we get a palindrome (234334323433432).

The spelling of 112112211222221 in words is "one hundred twelve trillion, one hundred twelve billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-one".