201221130203220 has 48 divisors (see below), whose sum is σ = 582847411628160. Its totient is φ = 51808658810496.

The previous prime is 201221130203123. The next prime is 201221130203227. The reversal of 201221130203220 is 22302031122102.

It is a super-2 number, since 2×201221130203220² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221130203227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 57822162112 + ... + 57822165591.

It is an arithmetic number, because the mean of its divisors is an integer number (12142654408920).

Almost surely, 2^{201221130203220} is an apocalyptic number.

201221130203220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201221130203220 is an abundant number, since it is smaller than the sum of its proper divisors (381626281424940).

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

201221130203220 is a wasteful number, since it uses less digits than its factorization.

201221130203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115644327744 (or 115644327742 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 201221130203220 its reverse (22302031122102), we get a palindrome (223523161325322).

The spelling of 201221130203220 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred thirty million, two hundred three thousand, two hundred twenty".