201221220023320 has 80 divisors (see below), whose sum is σ = 528174275092560. Its totient is φ = 68990132546496.

The previous prime is 201221220023281. The next prime is 201221220023363. The reversal of 201221220023320 is 23320022122102.

201221220023320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 201221220023291 and 201221220023300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1047494652 + ... + 1047686731.

It is an arithmetic number, because the mean of its divisors is an integer number (6602178438657).

Almost surely, 2^{201221220023320} is an apocalyptic number.

201221220023320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201221220023320 is an abundant number, since it is smaller than the sum of its proper divisors (326953055069240).

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

201221220023320 is an equidigital number, since it uses as much as digits as its factorization.

201221220023320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095181422 (or 2095181397 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 201221220023320 its reverse (23320022122102), we get a palindrome (224541242145422).

The spelling of 201221220023320 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred twenty million, twenty-three thousand, three hundred twenty".