12111100101012 has 72 divisors (see below), whose sum is σ = 31588273634400. Its totient is φ = 3607826404160.

The previous prime is 12111100100963. The next prime is 12111100101047. The reversal of 12111100101012 is 21010100111121.

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 23 ways as a sum of consecutive naturals, for example, 70600587 + ... + 70771922.

It is an arithmetic number, because the mean of its divisors is an integer number (438726022700).

Almost surely, 2^{12111100101012} is an apocalyptic number.

12111100101012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111100101012 is an abundant number, since it is smaller than the sum of its proper divisors (19477173533388).

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

12111100101012 is a wasteful number, since it uses less digits than its factorization.

12111100101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141372597 (or 141372584 counting only the distinct ones).

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

Adding to 12111100101012 its reverse (21010100111121), we get a palindrome (33121200212133).

The spelling of 12111100101012 in words is "twelve trillion, one hundred eleven billion, one hundred million, one hundred one thousand, twelve".