111211000000 has 98 divisors (see below), whose sum is σ = 275854359644. Its totient is φ = 44484000000.

The previous prime is 111210999989. The next prime is 111211000007. The reversal of 111211000000 is 112111.

It is not an unprimeable number, because it can be changed into a prime (111211000007) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 944395 + ... + 1055605.

Almost surely, 2^111211000000 is an apocalyptic number.

111211000000 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 111211000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137927179822).

111211000000 is an abundant number, since it is smaller than the sum of its proper divisors (164643359644).

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

111211000000 is an frugal number, since it uses more digits than its factorization.

111211000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111253 (or 111218 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 111211000000 its reverse (112111), we get a palindrome (111211112111).

The spelling of 111211000000 in words is "one hundred eleven billion, two hundred eleven million", and thus it is an aban number.