201212220220100 has 72 divisors (see below), whose sum is σ = 444037507593120. Its totient is φ = 79119584135680.

The previous prime is 201212220220087. The next prime is 201212220220103. The reversal of 201212220220100 is 1022022212102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (201212220220103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 484731239 + ... + 485146161.

It is an arithmetic number, because the mean of its divisors is an integer number (6167187605460).

Almost surely, 2^{201212220220100} is an apocalyptic number.

201212220220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212220220100 is an abundant number, since it is smaller than the sum of its proper divisors (242825287373020).

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

201212220220100 is a wasteful number, since it uses less digits than its factorization.

201212220220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497189 (or 497182 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 201212220220100 its reverse (1022022212102), we get a palindrome (202234242432202).

The spelling of 201212220220100 in words is "two hundred one trillion, two hundred twelve billion, two hundred twenty million, two hundred twenty thousand, one hundred".