221002311231300 has 144 divisors (see below), whose sum is σ = 647345018378240. Its totient is φ = 58207783455360.

The previous prime is 221002311231269. The next prime is 221002311231313. The reversal of 221002311231300 is 3132113200122.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2275509 + ... + 21146691.

Almost surely, 2^{221002311231300} is an apocalyptic number.

221002311231300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221002311231300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323672509189120).

221002311231300 is an abundant number, since it is smaller than the sum of its proper divisors (426342707146940).

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

221002311231300 is a wasteful number, since it uses less digits than its factorization.

221002311231300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18871682 (or 18871675 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221002311231300 its reverse (3132113200122), we get a palindrome (224134424431422).

The spelling of 221002311231300 in words is "two hundred twenty-one trillion, two billion, three hundred eleven million, two hundred thirty-one thousand, three hundred".