112121021221 has 16 divisors (see below), whose sum is σ = 126153116928. Its totient is φ = 98771752000.

The previous prime is 112121021209. The next prime is 112121021263. The reversal of 112121021221 is 122120121211.

It is a cyclic number.

It is not a de Polignac number, because 112121021221 - 2²⁵ = 112087466789 is a prime.

It is a super-2 number, since 2×112121021221² (a number of 23 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 = 112121021195 and 112121021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121021291) 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, 1021390 + ... + 1125823.

It is an arithmetic number, because the mean of its divisors is an integer number (7884569808).

Almost surely, 2^112121021221 is an apocalyptic number.

112121021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

112121021221 is a deficient number, since it is larger than the sum of its proper divisors (14032095707).

112121021221 is a wasteful number, since it uses less digits than its factorization.

112121021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147372.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 112121021221 its reverse (122120121211), we get a palindrome (234241142432).

The spelling of 112121021221 in words is "one hundred twelve billion, one hundred twenty-one million, twenty-one thousand, two hundred twenty-one".