201000022010100 has 216 divisors, whose sum is σ = 647076975782328. Its totient is φ = 52149268454400.

The previous prime is 201000022010009. The next prime is 201000022010113. The reversal of 201000022010100 is 1010220000102.

It can be written as a sum of positive squares in 12 ways, for example, as 23866175631204 + 177133846378896 = 4885302^2 + 13309164^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

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 71 ways as a sum of consecutive naturals, for example, 941517370 + ... + 941730830.

It is an arithmetic number, because the mean of its divisors is an integer number (2995726739733).

Almost surely, 2^{201000022010100} is an apocalyptic number.

201000022010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201000022010100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323538487891164).

201000022010100 is an abundant number, since it is smaller than the sum of its proper divisors (446076953772228).

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

201000022010100 is a wasteful number, since it uses less digits than its factorization.

201000022010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241795 (or 241785 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 201000022010100 its reverse (1010220000102), we get a palindrome (202010242010202).

The spelling of 201000022010100 in words is "two hundred one trillion, twenty-two million, ten thousand, one hundred".