201121012210100 has 36 divisors (see below), whose sum is σ = 436433968836684. Its totient is φ = 80448151918080.

The previous prime is 201121012210043. The next prime is 201121012210121. The reversal of 201121012210100 is 1012210121102.

It can be written as a sum of positive squares in 6 ways, for example, as 1026294615844 + 200094717594256 = 1013062^2 + 14145484^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30591554 + ... + 36579846.

It is an arithmetic number, because the mean of its divisors is an integer number (12123165801019).

Almost surely, 2^{201121012210100} is an apocalyptic number.

201121012210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201121012210100 is an abundant number, since it is smaller than the sum of its proper divisors (235312956626584).

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

201121012210100 is a wasteful number, since it uses less digits than its factorization.

201121012210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6324164 (or 6324157 counting only the distinct ones).

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

Adding to 201121012210100 its reverse (1012210121102), we get a palindrome (202133222331202).

The spelling of 201121012210100 in words is "two hundred one trillion, one hundred twenty-one billion, twelve million, two hundred ten thousand, one hundred".