11112121111980 has 48 divisors (see below), whose sum is σ = 35558787559680. Its totient is φ = 2539913396928.

The previous prime is 11112121111979. The next prime is 11112121111981. The reversal of 11112121111980 is 8911112121111.

It is an interprime number because it is at equal distance from previous prime (11112121111979) and next prime (11112121111981).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (11112121111981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13228715190 + ... + 13228716029.

It is an arithmetic number, because the mean of its divisors is an integer number (740808074160).

Almost surely, 2^{11112121111980} is an apocalyptic number.

11112121111980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112121111980 is an abundant number, since it is smaller than the sum of its proper divisors (24446666447700).

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

11112121111980 is a wasteful number, since it uses less digits than its factorization.

11112121111980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26457431238 (or 26457431236 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 30.

The spelling of 11112121111980 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, nine hundred eighty".