201221014243420 has 12 divisors (see below), whose sum is σ = 422564129911224. Its totient is φ = 80488405697360.

The previous prime is 201221014243373. The next prime is 201221014243429. The reversal of 201221014243420 is 24342410122102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221014243429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5030525356066 + ... + 5030525356105.

It is an arithmetic number, because the mean of its divisors is an integer number (35213677492602).

Almost surely, 2^{201221014243420} is an apocalyptic number.

201221014243420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201221014243420 is an abundant number, since it is smaller than the sum of its proper divisors (221343115667804).

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

201221014243420 is a wasteful number, since it uses less digits than its factorization.

201221014243420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10061050712180 (or 10061050712178 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 201221014243420 its reverse (24342410122102), we get a palindrome (225563424365522).

The spelling of 201221014243420 in words is "two hundred one trillion, two hundred twenty-one billion, fourteen million, two hundred forty-three thousand, four hundred twenty".