201021200220100 has 72 divisors (see below), whose sum is σ = 469821956345280. Its totient is φ = 74215174270080.

The previous prime is 201021200220097. The next prime is 201021200220119. The reversal of 201021200220100 is 1022002120102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3642279 + ... + 20379121.

It is an arithmetic number, because the mean of its divisors is an integer number (6525304949240).

Almost surely, 2^{201021200220100} is an apocalyptic number.

201021200220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021200220100 is an abundant number, since it is smaller than the sum of its proper divisors (268800756125180).

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

201021200220100 is a wasteful number, since it uses less digits than its factorization.

201021200220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16746109 (or 16746102 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201021200220100 its reverse (1022002120102), we get a palindrome (202043202340202).

The spelling of 201021200220100 in words is "two hundred one trillion, twenty-one billion, two hundred million, two hundred twenty thousand, one hundred".