121110200020 has 12 divisors (see below), whose sum is σ = 254331420084. Its totient is φ = 48444080000.

The previous prime is 121110200009. The next prime is 121110200039. The reversal of 121110200020 is 20002011121.

It can be written as a sum of positive squares in 2 ways, for example, as 50730354756 + 70379845264 = 225234^2 + 265292^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3027754981 + ... + 3027755020.

It is an arithmetic number, because the mean of its divisors is an integer number (21194285007).

Almost surely, 2^121110200020 is an apocalyptic number.

121110200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121110200020 is an abundant number, since it is smaller than the sum of its proper divisors (133221220064).

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

121110200020 is a wasteful number, since it uses less digits than its factorization.

121110200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6055510010 (or 6055510008 counting only the distinct ones).

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

Adding to 121110200020 its reverse (20002011121), we get a palindrome (141112211141).

The spelling of 121110200020 in words is "one hundred twenty-one billion, one hundred ten million, two hundred thousand, twenty".