221132213300 has 36 divisors (see below), whose sum is σ = 480259389036. Its totient is φ = 88378694400.

The previous prime is 221132213287. The next prime is 221132213303. The reversal of 221132213300 is 3312231122.

It can be written as a sum of positive squares in 6 ways, for example, as 393863716 + 220738349584 = 19846^2 + 469828^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221132213303) 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, 807491 + ... + 1046090.

Almost surely, 2^221132213300 is an apocalyptic number.

221132213300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221132213300 is an abundant number, since it is smaller than the sum of its proper divisors (259127175736).

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

221132213300 is a wasteful number, since it uses less digits than its factorization.

221132213300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854788 (or 1854781 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221132213300 its reverse (3312231122), we get a palindrome (224444444422).

The spelling of 221132213300 in words is "two hundred twenty-one billion, one hundred thirty-two million, two hundred thirteen thousand, three hundred".