1210111312 has 20 divisors (see below), whose sum is σ = 2346094260. Its totient is φ = 604667648.

The previous prime is 1210111277. The next prime is 1210111313. The reversal of 1210111312 is 2131110121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 680375056 + 529736256 = 26084^2 + 23016^2 .

It is a super-2 number, since 2×1210111312² = 2928738774860722688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210111292 and 1210111301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210111313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2364 + ... + 49252.

It is an arithmetic number, because the mean of its divisors is an integer number (117304713).

Almost surely, 2^1210111312 is an apocalyptic number.

It is an amenable number.

1210111312 is a deficient number, since it is larger than the sum of its proper divisors (1135982948).

1210111312 is a wasteful number, since it uses less digits than its factorization.

1210111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48510 (or 48504 counting only the distinct ones).

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

The square root of 1210111312 is about 34786.6542225607. The cubic root of 1210111312 is about 1065.6349118848.

Adding to 1210111312 its reverse (2131110121), we get a palindrome (3341221433).

The spelling of 1210111312 in words is "one billion, two hundred ten million, one hundred eleven thousand, three hundred twelve".