121110200000020 has 96 divisors (see below), whose sum is σ = 317122881546240. Its totient is φ = 37744543539840.

The previous prime is 121110200000011. The next prime is 121110200000021. The reversal of 121110200000020 is 20000002011121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 121110199999952 and 121110200000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110200000021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9972027 + ... + 18484093.

It is an arithmetic number, because the mean of its divisors is an integer number (3303363349440).

Almost surely, 2^{121110200000020} is an apocalyptic number.

121110200000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121110200000020 is an abundant number, since it is smaller than the sum of its proper divisors (196012681546220).

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

121110200000020 is a wasteful number, since it uses less digits than its factorization.

121110200000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8521333 (or 8521331 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121110200000020 its reverse (20000002011121), we get a palindrome (141110202011141).

The spelling of 121110200000020 in words is "one hundred twenty-one trillion, one hundred ten billion, two hundred million, twenty", and thus it is an aban number.