112112121221 has 8 divisors (see below), whose sum is σ = 120891120000. Its totient is φ = 103620958560.

The previous prime is 112112121211. The next prime is 112112121223. The reversal of 112112121221 is 122121211211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112112121221 is a prime.

It is a super-3 number, since 3×112112121221³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 112112121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112112121223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71958221 + ... + 71959778.

It is an arithmetic number, because the mean of its divisors is an integer number (15111390000).

Almost surely, 2^112112121221 is an apocalyptic number.

It is an amenable number.

112112121221 is a deficient number, since it is larger than the sum of its proper divisors (8778998779).

112112121221 is a wasteful number, since it uses less digits than its factorization.

112112121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143918059.

The product of its digits is 32, while the sum is 17.

Adding to 112112121221 its reverse (122121211211), we get a palindrome (234233332432).

The spelling of 112112121221 in words is "one hundred twelve billion, one hundred twelve million, one hundred twenty-one thousand, two hundred twenty-one".