112121112221121 has 4 divisors (see below), whose sum is σ = 149494816294832. Its totient is φ = 74747408147412.

The previous prime is 112121112221071. The next prime is 112121112221141. The reversal of 112121112221121 is 121122211121211.

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 112121112221121 - 2⁷ = 112121112220993 is a prime.

It is a super-2 number, since 2×112121112221121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112121112221141) 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, 18686852036851 + ... + 18686852036856.

It is an arithmetic number, because the mean of its divisors is an integer number (37373704073708).

Almost surely, 2^{112121112221121} is an apocalyptic number.

It is an amenable number.

112121112221121 is a deficient number, since it is larger than the sum of its proper divisors (37373704073711).

112121112221121 is an equidigital number, since it uses as much as digits as its factorization.

112121112221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37373704073710.

The product of its digits is 64, while the sum is 21.

Adding to 112121112221121 its reverse (121122211121211), we get a palindrome (233243323342332).

The spelling of 112121112221121 in words is "one hundred twelve trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".