111010212120020 has 48 divisors (see below), whose sum is σ = 243258784675200. Its totient is φ = 42473188872576.

The previous prime is 111010212119953. The next prime is 111010212120079. The reversal of 111010212120020 is 20021212010111.

It is a junction number, because it is equal to n+sod(n) for n = 111010212119977 and 111010212120004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76143434 + ... + 77587646.

It is an arithmetic number, because the mean of its divisors is an integer number (5067891347400).

Almost surely, 2^{111010212120020} is an apocalyptic number.

111010212120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111010212120020 is an abundant number, since it is smaller than the sum of its proper divisors (132248572555180).

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

111010212120020 is a wasteful number, since it uses less digits than its factorization.

111010212120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611344 (or 1611342 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111010212120020 its reverse (20021212010111), we get a palindrome (131031424130131).

The spelling of 111010212120020 in words is "one hundred eleven trillion, ten billion, two hundred twelve million, one hundred twenty thousand, twenty".