112721919 has 16 divisors (see below), whose sum is σ = 159494400. Its totient is φ = 70659776.

The previous prime is 112721893. The next prime is 112721929. The reversal of 112721919 is 919127211.

It is a cyclic number.

It is not a de Polignac number, because 112721919 - 2²⁰ = 111673343 is a prime.

It is a super-2 number, since 2×112721919² = 25412462046085122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 112721919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112721929) 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, 9774 + ... + 17915.

It is an arithmetic number, because the mean of its divisors is an integer number (9968400).

Almost surely, 2^112721919 is an apocalyptic number.

112721919 is a deficient number, since it is larger than the sum of its proper divisors (46772481).

112721919 is a wasteful number, since it uses less digits than its factorization.

112721919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27774.

The product of its digits is 2268, while the sum is 33.

The square root of 112721919 is about 10617.0579258098. The cubic root of 112721919 is about 483.0619066859.

The spelling of 112721919 in words is "one hundred twelve million, seven hundred twenty-one thousand, nine hundred nineteen".