111311012412 has 36 divisors (see below), whose sum is σ = 281844042480. Its totient is φ = 37041094272.

The previous prime is 111311012399. The next prime is 111311012413. The reversal of 111311012412 is 214210113111.

111311012412 is a `hidden beast` number, since 111 + 311 + 0 + 1 + 241 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111311012413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2585712 + ... + 2628407.

It is an arithmetic number, because the mean of its divisors is an integer number (7829001180).

Almost surely, 2^111311012412 is an apocalyptic number.

111311012412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111311012412 is an abundant number, since it is smaller than the sum of its proper divisors (170533030068).

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

111311012412 is a wasteful number, since it uses less digits than its factorization.

111311012412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5214722 (or 5214717 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 111311012412 its reverse (214210113111), we get a palindrome (325521125523).

The spelling of 111311012412 in words is "one hundred eleven billion, three hundred eleven million, twelve thousand, four hundred twelve".