111212113000 has 96 divisors (see below), whose sum is σ = 276445554840. Its totient is φ = 41867980800.

The previous prime is 111212112959. The next prime is 111212113007. The reversal of 111212113000 is 311212111.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 611968644 + 110600144356 = 24738^2 + 332566^2 .

It is not an unprimeable number, because it can be changed into a prime (111212113007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96592 + ... + 481408.

Almost surely, 2^111212113000 is an apocalyptic number.

111212113000 is a gapful number since it is divisible by the number (10) 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 111212113000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138222777420).

111212113000 is an abundant number, since it is smaller than the sum of its proper divisors (165233441840).

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

111212113000 is a wasteful number, since it uses less digits than its factorization.

111212113000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384872 (or 384841 counting only the distinct ones).

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

Adding to 111212113000 its reverse (311212111), we get a palindrome (111523325111).

The spelling of 111212113000 in words is "one hundred eleven billion, two hundred twelve million, one hundred thirteen thousand".