1213112110 has 32 divisors (see below), whose sum is σ = 2546481600. Its totient is φ = 415922976.

The previous prime is 1213112083. The next prime is 1213112113. The reversal of 1213112110 is 112113121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213112113) 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, 173409 + ... + 180268.

It is an arithmetic number, because the mean of its divisors is an integer number (79577550).

Almost surely, 2^1213112110 is an apocalyptic number.

1213112110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213112110 is an abundant number, since it is smaller than the sum of its proper divisors (1333369490).

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

1213112110 is an equidigital number, since it uses as much as digits as its factorization.

1213112110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353705 (or 353691 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1213112110 is about 34829.7589713165. The cubic root of 1213112110 is about 1066.5150280316.

Adding to 1213112110 its reverse (112113121), we get a palindrome (1325225231).

The spelling of 1213112110 in words is "one billion, two hundred thirteen million, one hundred twelve thousand, one hundred ten".