19121112 has 24 divisors (see below), whose sum is σ = 51786540. Its totient is φ = 6373680.

The previous prime is 19121101. The next prime is 19121117. The reversal of 19121112 is 21112191.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19121117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132714 + ... + 132857.

Almost surely, 2^19121112 is an apocalyptic number.

19121112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19121112 is an abundant number, since it is smaller than the sum of its proper divisors (32665428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19121112 is a wasteful number, since it uses less digits than its factorization.

19121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265583 (or 265576 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

The square root of 19121112 is about 4372.7693742067. The cubic root of 19121112 is about 267.4059389209.

The spelling of 19121112 in words is "nineteen million, one hundred twenty-one thousand, one hundred twelve".