111243144012 has 192 divisors, whose sum is σ = 350169673728. Its totient is φ = 26544672000.

The previous prime is 111243143993. The next prime is 111243144031. The reversal of 111243144012 is 210441342111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111243143993) and next prime (111243144031).

It is a super-2 number, since 2×111243144012² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2512587 + ... + 2556477.

It is an arithmetic number, because the mean of its divisors is an integer number (1823800384).

Almost surely, 2^111243144012 is an apocalyptic number.

111243144012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111243144012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175084836864).

111243144012 is an abundant number, since it is smaller than the sum of its proper divisors (238926529716).

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

111243144012 is a wasteful number, since it uses less digits than its factorization.

111243144012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44140 (or 44138 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 111243144012 its reverse (210441342111), we get a palindrome (321684486123).

It can be divided in two parts, 111243 and 144012, that added together give a triangular number (255255 = T₇₁₄).

The spelling of 111243144012 in words is "one hundred eleven billion, two hundred forty-three million, one hundred forty-four thousand, twelve".