111212110000020 has 96 divisors (see below), whose sum is σ = 312142230892800. Its totient is φ = 29585317027840.

The previous prime is 111212109999971. The next prime is 111212110000031. The reversal of 111212110000020 is 20000011212111.

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 = 111212109999960 and 111212110000005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154303009 + ... + 155022071.

It is an arithmetic number, because the mean of its divisors is an integer number (3251481571800).

Almost surely, 2^{111212110000020} is an apocalyptic number.

111212110000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212110000020 is an abundant number, since it is smaller than the sum of its proper divisors (200930120892780).

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

111212110000020 is a wasteful number, since it uses less digits than its factorization.

111212110000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725265 (or 725263 counting only the distinct ones).

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

Adding to 111212110000020 its reverse (20000011212111), we get a palindrome (131212121212131).

The spelling of 111212110000020 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred ten million, twenty", and thus it is an aban number.