112121221012221 has 4 divisors (see below), whose sum is σ = 149494961349632. Its totient is φ = 74747480674812.

The previous prime is 112121221012189. The next prime is 112121221012247. The reversal of 112121221012221 is 122210122121211.

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 not a de Polignac number, because 112121221012221 - 2⁵ = 112121221012189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121221012291) 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, 18686870168701 + ... + 18686870168706.

It is an arithmetic number, because the mean of its divisors is an integer number (37373740337408).

Almost surely, 2^{112121221012221} is an apocalyptic number.

It is an amenable number.

112121221012221 is a deficient number, since it is larger than the sum of its proper divisors (37373740337411).

112121221012221 is an equidigital number, since it uses as much as digits as its factorization.

112121221012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37373740337410.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 112121221012221 its reverse (122210122121211), we get a palindrome (234331343133432).

The spelling of 112121221012221 in words is "one hundred twelve trillion, one hundred twenty-one billion, two hundred twenty-one million, twelve thousand, two hundred twenty-one".