201221401300 has 18 divisors (see below), whose sum is σ = 436650441038. Its totient is φ = 80488560480.

The previous prime is 201221401291. The next prime is 201221401321. The reversal of 201221401300 is 3104122102.

It can be written as a sum of positive squares in 3 ways, for example, as 83503044 + 201137898256 = 9138^2 + 448484^2 .

It is a super-2 number, since 2×201221401300² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1006106907 + ... + 1006107106.

Almost surely, 2^201221401300 is an apocalyptic number.

201221401300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201221401300 is an abundant number, since it is smaller than the sum of its proper divisors (235429039738).

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

201221401300 is a wasteful number, since it uses less digits than its factorization.

201221401300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012214027 (or 2012214020 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 201221401300 its reverse (3104122102), we get a palindrome (204325523402).

The spelling of 201221401300 in words is "two hundred one billion, two hundred twenty-one million, four hundred one thousand, three hundred".