221021133143200 has 72 divisors (see below), whose sum is σ = 581073059873628. Its totient is φ = 81607803002880.

The previous prime is 221021133143183. The next prime is 221021133143243. The reversal of 221021133143200 is 2341331120122.

It can be written as a sum of positive squares in 6 ways, for example, as 121171396652944 + 99849736490256 = 11007788^2 + 9992484^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10626005617 + ... + 10626026416.

Almost surely, 2^{221021133143200} is an apocalyptic number.

221021133143200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221021133143200 is an abundant number, since it is smaller than the sum of its proper divisors (360051926730428).

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

221021133143200 is a wasteful number, since it uses less digits than its factorization.

221021133143200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21252032066 (or 21252032053 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 221021133143200 its reverse (2341331120122), we get a palindrome (223362464263322).

The spelling of 221021133143200 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred thirty-three million, one hundred forty-three thousand, two hundred".