201221023003220 has 24 divisors (see below), whose sum is σ = 460979070880608. Its totient is φ = 73171281092000.

The previous prime is 201221023003213. The next prime is 201221023003223. The reversal of 201221023003220 is 22300320122102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 201221023003192 and 201221023003201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221023003223) 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 7 ways as a sum of consecutive naturals, for example, 457320506606 + ... + 457320507045.

It is an arithmetic number, because the mean of its divisors is an integer number (19207461286692).

Almost surely, 2^{201221023003220} is an apocalyptic number.

201221023003220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201221023003220 is an abundant number, since it is smaller than the sum of its proper divisors (259758047877388).

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

201221023003220 is a wasteful number, since it uses less digits than its factorization.

201221023003220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914641013671 (or 914641013669 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 201221023003220 its reverse (22300320122102), we get a palindrome (223521343125322).

The spelling of 201221023003220 in words is "two hundred one trillion, two hundred twenty-one billion, twenty-three million, three thousand, two hundred twenty".