112221012212121 has 4 divisors (see below), whose sum is σ = 149628016282832. Its totient is φ = 74814008141412.

The previous prime is 112221012212119. The next prime is 112221012212123. The reversal of 112221012212121 is 121212210122211.

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 an interprime number because it is at equal distance from previous prime (112221012212119) and next prime (112221012212123).

It is not a de Polignac number, because 112221012212121 - 2¹ = 112221012212119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112221012212123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18703502035351 + ... + 18703502035356.

It is an arithmetic number, because the mean of its divisors is an integer number (37407004070708).

Almost surely, 2^{112221012212121} is an apocalyptic number.

It is an amenable number.

112221012212121 is a deficient number, since it is larger than the sum of its proper divisors (37407004070711).

112221012212121 is an equidigital number, since it uses as much as digits as its factorization.

112221012212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37407004070710.

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

Adding to 112221012212121 its reverse (121212210122211), we get a palindrome (233433222334332).

The spelling of 112221012212121 in words is "one hundred twelve trillion, two hundred twenty-one billion, twelve million, two hundred twelve thousand, one hundred twenty-one".