111010120001988 has 24 divisors (see below), whose sum is σ = 259026375323520. Its totient is φ = 37002978764640.

The previous prime is 111010120001983. The next prime is 111010120001993. The reversal of 111010120001988 is 889100021010111.

It is a happy number.

111010120001988 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (111010120001983) and next prime (111010120001993).

It is not an unprimeable number, because it can be changed into a prime (111010120001983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48147783 + ... + 50400686.

It is an arithmetic number, because the mean of its divisors is an integer number (10792765638480).

Almost surely, 2^{111010120001988} is an apocalyptic number.

It is an amenable number.

111010120001988 is an abundant number, since it is smaller than the sum of its proper divisors (148016255321532).

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

111010120001988 is a wasteful number, since it uses less digits than its factorization.

111010120001988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98642347 (or 98642345 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 33.

The spelling of 111010120001988 in words is "one hundred eleven trillion, ten billion, one hundred twenty million, one thousand, nine hundred eighty-eight".