1213211112 has 16 divisors (see below), whose sum is σ = 3033027840. Its totient is φ = 404403696.

The previous prime is 1213211089. The next prime is 1213211173. The reversal of 1213211112 is 2111123121.

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 junction number, because it is equal to n+sod(n) for n = 1213211091 and 1213211100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25275208 + ... + 25275255.

It is an arithmetic number, because the mean of its divisors is an integer number (189564240).

Almost surely, 2^1213211112 is an apocalyptic number.

1213211112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213211112 is an abundant number, since it is smaller than the sum of its proper divisors (1819816728).

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

1213211112 is a wasteful number, since it uses less digits than its factorization.

1213211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50550472 (or 50550468 counting only the distinct ones).

The product of its digits is 24, while the sum is 15.

The square root of 1213211112 is about 34831.1801694976. The cubic root of 1213211112 is about 1066.5440399829.

Adding to 1213211112 its reverse (2111123121), we get a palindrome (3324334233).

The spelling of 1213211112 in words is "one billion, two hundred thirteen million, two hundred eleven thousand, one hundred twelve".