221021201021200 has 60 divisors (see below), whose sum is σ = 537401067286608. Its totient is φ = 87343317980800.

The previous prime is 221021201021189. The next prime is 221021201021209. The reversal of 221021201021200 is 2120102120122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (221021201021209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3328599346 + ... + 3328665745.

Almost surely, 2^{221021201021200} is an apocalyptic number.

221021201021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221021201021200 is an abundant number, since it is smaller than the sum of its proper divisors (316379866265408).

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

221021201021200 is a wasteful number, since it uses less digits than its factorization.

221021201021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6657265192 (or 6657265181 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221021201021200 its reverse (2120102120122), we get a palindrome (223141303141322).

The spelling of 221021201021200 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred one million, twenty-one thousand, two hundred".