210001121200100 has 36 divisors (see below), whose sum is σ = 456143577887844. Its totient is φ = 83919131450880.

The previous prime is 210001121200043. The next prime is 210001121200103. The reversal of 210001121200100 is 1002121100012.

It can be written as a sum of positive squares in 6 ways, for example, as 392517286144 + 209608603913956 = 626512^2 + 14477866^2 .

It is not an unprimeable number, because it can be changed into a prime (210001121200103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1016359049 + ... + 1016565648.

It is an arithmetic number, because the mean of its divisors is an integer number (12670654941329).

Almost surely, 2^{210001121200100} is an apocalyptic number.

210001121200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210001121200100 is an abundant number, since it is smaller than the sum of its proper divisors (246142456687744).

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

210001121200100 is a wasteful number, since it uses less digits than its factorization.

210001121200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032925744 (or 2032925737 counting only the distinct ones).

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

Adding to 210001121200100 its reverse (1002121100012), we get a palindrome (211003242300112).

The spelling of 210001121200100 in words is "two hundred ten trillion, one billion, one hundred twenty-one million, two hundred thousand, one hundred".