11111001312 has 48 divisors (see below), whose sum is σ = 29877764112. Its totient is φ = 3613332480.

The previous prime is 11111001277. The next prime is 11111001329. The reversal of 11111001312 is 21310011111.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1407523 + ... + 1415394.

It is an arithmetic number, because the mean of its divisors is an integer number (622453419).

Almost surely, 2^11111001312 is an apocalyptic number.

11111001312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11111001312 is an abundant number, since it is smaller than the sum of its proper divisors (18766762800).

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

11111001312 is a wasteful number, since it uses less digits than its factorization.

11111001312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822971 (or 2822963 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 11111001312 its reverse (21310011111), we get a palindrome (32421012423).

The spelling of 11111001312 in words is "eleven billion, one hundred eleven million, one thousand, three hundred twelve".