1215332300221 has 16 divisors (see below), whose sum is σ = 1328438651904. Its totient is φ = 1105030833984.

The previous prime is 1215332300207. The next prime is 1215332300227. The reversal of 1215332300221 is 1220032335121.

It is a cyclic number.

It is not a de Polignac number, because 1215332300221 - 2⁷ = 1215332300093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215332300227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17696676 + ... + 17765218.

It is an arithmetic number, because the mean of its divisors is an integer number (83027415744).

Almost surely, 2^{1215332300221} is an apocalyptic number.

It is an amenable number.

1215332300221 is a deficient number, since it is larger than the sum of its proper divisors (113106351683).

1215332300221 is a wasteful number, since it uses less digits than its factorization.

1215332300221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88980.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 1215332300221 its reverse (1220032335121), we get a palindrome (2435364635342).

The spelling of 1215332300221 in words is "one trillion, two hundred fifteen billion, three hundred thirty-two million, three hundred thousand, two hundred twenty-one".