111012100120020 has 192 divisors, whose sum is σ = 356962064578560. Its totient is φ = 25493913561600.

The previous prime is 111012100119911. The next prime is 111012100120057. The reversal of 111012100120020 is 20021001210111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111012100119978 and 111012100120005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 194222574 + ... + 194793306.

It is an arithmetic number, because the mean of its divisors is an integer number (1859177419680).

Almost surely, 2^{111012100120020} is an apocalyptic number.

111012100120020 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 111012100120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178481032289280).

111012100120020 is an abundant number, since it is smaller than the sum of its proper divisors (245949964458540).

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

111012100120020 is a wasteful number, since it uses less digits than its factorization.

111012100120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586286 (or 586284 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111012100120020 its reverse (20021001210111), we get a palindrome (131033101330131).

The spelling of 111012100120020 in words is "one hundred eleven trillion, twelve billion, one hundred million, one hundred twenty thousand, twenty".