112112100122221 has 4 divisors (see below), whose sum is σ = 112112237967772. Its totient is φ = 112111962276672.

The previous prime is 112112100122219. The next prime is 112112100122353. The reversal of 112112100122221 is 122221001211211.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32923209515625 + 79188890606596 = 5737875^2 + 8898814^2 .

It is a cyclic number.

It is not a de Polignac number, because 112112100122221 - 2¹ = 112112100122219 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 (112112100122921) 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, 67695516 + ... + 69331861.

It is an arithmetic number, because the mean of its divisors is an integer number (28028059491943).

Almost surely, 2^{112112100122221} is an apocalyptic number.

It is an amenable number.

112112100122221 is a deficient number, since it is larger than the sum of its proper divisors (137845551).

112112100122221 is an equidigital number, since it uses as much as digits as its factorization.

112112100122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137845550.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 112112100122221 its reverse (122221001211211), we get a palindrome (234333101333432).

The spelling of 112112100122221 in words is "one hundred twelve trillion, one hundred twelve billion, one hundred million, one hundred twenty-two thousand, two hundred twenty-one".