201221233320020 has 24 divisors (see below), whose sum is σ = 422566012597344. Its totient is φ = 80488222351776.

The previous prime is 201221233319971. The next prime is 201221233320031. The reversal of 201221233320020 is 20023332122102.

It is a super-3 number, since 3×201221233320020³ (a number of 44 digits) contains 333 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10792514 + ... + 22779833.

It is an arithmetic number, because the mean of its divisors is an integer number (17606917191556).

Almost surely, 2^{201221233320020} is an apocalyptic number.

201221233320020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201221233320020 is an abundant number, since it is smaller than the sum of its proper divisors (221344779277324).

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

201221233320020 is a wasteful number, since it uses less digits than its factorization.

201221233320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33872039 (or 33872037 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 201221233320020 its reverse (20023332122102), we get a palindrome (221244565442122).

The spelling of 201221233320020 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred thirty-three million, three hundred twenty thousand, twenty".