1111212111000 has 128 divisors (see below), whose sum is σ = 3586533163200. Its totient is φ = 286105164800.

The previous prime is 1111212110959. The next prime is 1111212111077. The reversal of 1111212111000 is 1112121111.

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 31 ways as a sum of consecutive naturals, for example, 6299277 + ... + 6473276.

Almost surely, 2^{1111212111000} is an apocalyptic number.

1111212111000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111212111000 is an abundant number, since it is smaller than the sum of its proper divisors (2475321052200).

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

1111212111000 is a wasteful number, since it uses less digits than its factorization.

1111212111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12772606 (or 12772592 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1111212111000 its reverse (1112121111), we get a palindrome (1112324232111).

The spelling of 1111212111000 in words is "one trillion, one hundred eleven billion, two hundred twelve million, one hundred eleven thousand".