1111261312 has 32 divisors (see below), whose sum is σ = 2530105920. Its totient is φ = 476254464.

The previous prime is 1111261289. The next prime is 1111261313. The reversal of 1111261312 is 2131621111.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×1111261312² = 2469803407095922688, 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 1111261312.

It is not an unprimeable number, because it can be changed into a prime (1111261313) 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, 619228 + ... + 621019.

It is an arithmetic number, because the mean of its divisors is an integer number (79065810).

Almost surely, 2^1111261312 is an apocalyptic number.

It is an amenable number.

1111261312 is an abundant number, since it is smaller than the sum of its proper divisors (1418844608).

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

1111261312 is an equidigital number, since it uses as much as digits as its factorization.

1111261312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240268 (or 1240256 counting only the distinct ones).

The product of its digits is 72, while the sum is 19.

The square root of 1111261312 is about 33335.5862705308. The cubic root of 1111261312 is about 1035.7908374569.

Adding to 1111261312 its reverse (2131621111), we get a palindrome (3242882423).

The spelling of 1111261312 in words is "one billion, one hundred eleven million, two hundred sixty-one thousand, three hundred twelve".