1021332000221 has 4 divisors (see below), whose sum is σ = 1099896000252. Its totient is φ = 942768000192.

The previous prime is 1021332000217. The next prime is 1021332000233. The reversal of 1021332000221 is 1220002331201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 408814456996 + 612517543225 = 639386^2 + 782635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021332000221 - 2² = 1021332000217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021332000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021332000421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39281999996 + ... + 39282000021.

It is an arithmetic number, because the mean of its divisors is an integer number (274974000063).

Almost surely, 2^{1021332000221} is an apocalyptic number.

It is an amenable number.

1021332000221 is a deficient number, since it is larger than the sum of its proper divisors (78564000031).

1021332000221 is an equidigital number, since it uses as much as digits as its factorization.

1021332000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78564000030.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1021332000221 its reverse (1220002331201), we get a palindrome (2241334331422).

The spelling of 1021332000221 in words is "one trillion, twenty-one billion, three hundred thirty-two million, two hundred twenty-one", and thus it is an aban number.