221001343312 has 40 divisors (see below), whose sum is σ = 455189124960. Its totient is φ = 103648348800.

The previous prime is 221001343309. The next prime is 221001343319. The reversal of 221001343312 is 213343100122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001343319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3568198 + ... + 3629605.

It is an arithmetic number, because the mean of its divisors is an integer number (11379728124).

Almost surely, 2^221001343312 is an apocalyptic number.

It is an amenable number.

221001343312 is an abundant number, since it is smaller than the sum of its proper divisors (234187781648).

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

221001343312 is a wasteful number, since it uses less digits than its factorization.

221001343312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7197931 (or 7197925 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 221001343312 its reverse (213343100122), we get a palindrome (434344443434).

The spelling of 221001343312 in words is "two hundred twenty-one billion, one million, three hundred forty-three thousand, three hundred twelve".