210000121110020 has 12 divisors (see below), whose sum is σ = 441000254331084. Its totient is φ = 84000048444000.

The previous prime is 210000121110019. The next prime is 210000121110023. The reversal of 210000121110020 is 20011121000012.

It can be written as a sum of positive squares in 2 ways, for example, as 142177912650244 + 67822208459776 = 11923838^2 + 8235424^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210000121109983 and 210000121110010.

It is not an unprimeable number, because it can be changed into a prime (210000121110023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5250003027731 + ... + 5250003027770.

It is an arithmetic number, because the mean of its divisors is an integer number (36750021194257).

Almost surely, 2^{210000121110020} is an apocalyptic number.

210000121110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210000121110020 is an abundant number, since it is smaller than the sum of its proper divisors (231000133221064).

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

210000121110020 is a wasteful number, since it uses less digits than its factorization.

210000121110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500006055510 (or 10500006055508 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210000121110020 its reverse (20011121000012), we get a palindrome (230011242110032).

The spelling of 210000121110020 in words is "two hundred ten trillion, one hundred twenty-one million, one hundred ten thousand, twenty".