112121011212221 has 16 divisors (see below), whose sum is σ = 122356347543360. Its totient is φ = 101892766821120.

The previous prime is 112121011212169. The next prime is 112121011212241. The reversal of 112121011212221 is 122212110121211.

It is a happy number.

It is not a de Polignac number, because 112121011212221 - 2¹⁰ = 112121011211197 is a prime.

It is a super-2 number, since 2×112121011212221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112121011212193 and 112121011212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121011212241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407829035 + ... + 408103863.

It is an arithmetic number, because the mean of its divisors is an integer number (7647271721460).

Almost surely, 2^{112121011212221} is an apocalyptic number.

112121011212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

112121011212221 is a deficient number, since it is larger than the sum of its proper divisors (10235336331139).

112121011212221 is a wasteful number, since it uses less digits than its factorization.

112121011212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287596.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 112121011212221 its reverse (122212110121211), we get a palindrome (234333121333432).

The spelling of 112121011212221 in words is "one hundred twelve trillion, one hundred twenty-one billion, eleven million, two hundred twelve thousand, two hundred twenty-one".