112121110121221 has 4 divisors (see below), whose sum is σ = 112121145108000. Its totient is φ = 112121075134444.

The previous prime is 112121110121183. The next prime is 112121110121261. The reversal of 112121110121221 is 122121011121211.

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 112121110121221 - 2⁹ = 112121110120709 is a prime.

It is a super-2 number, since 2×112121110121221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121110121261) 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, 12140371 + ... + 19277728.

It is an arithmetic number, because the mean of its divisors is an integer number (28030286277000).

Almost surely, 2^{112121110121221} is an apocalyptic number.

It is an amenable number.

112121110121221 is a deficient number, since it is larger than the sum of its proper divisors (34986779).

112121110121221 is an equidigital number, since it uses as much as digits as its factorization.

112121110121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34986778.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 112121110121221 its reverse (122121011121211), we get a palindrome (234242121242432).

The spelling of 112121110121221 in words is "one hundred twelve trillion, one hundred twenty-one billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty-one".