21330132300691 has 2 divisors, whose sum is σ = 21330132300692. Its totient is φ = 21330132300690.

The previous prime is 21330132300647. The next prime is 21330132300709. The reversal of 21330132300691 is 19600323103312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21330132300691 - 2¹⁹ = 21330131776403 is a prime.

It is not a weakly prime, because it can be changed into another prime (21330132300611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665066150345 + 10665066150346.

It is an arithmetic number, because the mean of its divisors is an integer number (10665066150346).

Almost surely, 2^{21330132300691} is an apocalyptic number.

21330132300691 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330132300691 is an equidigital number, since it uses as much as digits as its factorization.

21330132300691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 34.

The spelling of 21330132300691 in words is "twenty-one trillion, three hundred thirty billion, one hundred thirty-two million, three hundred thousand, six hundred ninety-one".