111010102000020 has 120 divisors (see below), whose sum is σ = 348247236068424. Its totient is φ = 29602316899584.

The previous prime is 111010102000019. The next prime is 111010102000081. The reversal of 111010102000020 is 20000201010111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26004431098116 + 85005670901904 = 5099454^2 + 9219852^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111010101999966 and 111010102000011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 140957182 + ... + 141742538.

Almost surely, 2^{111010102000020} is an apocalyptic number.

111010102000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111010102000020 is an abundant number, since it is smaller than the sum of its proper divisors (237237134068404).

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

111010102000020 is a wasteful number, since it uses less digits than its factorization.

111010102000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872631 (or 872620 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111010102000020 its reverse (20000201010111), we get a palindrome (131010303010131).

The spelling of 111010102000020 in words is "one hundred eleven trillion, ten billion, one hundred two million, twenty", and thus it is an aban number.