221201200120 has 64 divisors (see below), whose sum is σ = 500549680800. Its totient is φ = 87975175680.

The previous prime is 221201200093. The next prime is 221201200153. The reversal of 221201200120 is 21002102122.

It is a happy number.

221201200120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221201200120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9010102 + ... + 9034618.

Almost surely, 2^221201200120 is an apocalyptic number.

221201200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221201200120 is an abundant number, since it is smaller than the sum of its proper divisors (279348480680).

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

221201200120 is a wasteful number, since it uses less digits than its factorization.

221201200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25808 (or 25804 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221201200120 its reverse (21002102122), we get a palindrome (242203302242).

The spelling of 221201200120 in words is "two hundred twenty-one billion, two hundred one million, two hundred thousand, one hundred twenty".