21132321307 has 2 divisors, whose sum is σ = 21132321308. Its totient is φ = 21132321306.

The previous prime is 21132321293. The next prime is 21132321383. The reversal of 21132321307 is 70312323112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21132321307 - 2¹¹ = 21132319259 is a prime.

It is not a weakly prime, because it can be changed into another prime (21132321107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566160653 + 10566160654.

It is an arithmetic number, because the mean of its divisors is an integer number (10566160654).

Almost surely, 2^21132321307 is an apocalyptic number.

21132321307 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132321307 is an equidigital number, since it uses as much as digits as its factorization.

21132321307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 21132321307 its reverse (70312323112), we get a palindrome (91444644419).

The spelling of 21132321307 in words is "twenty-one billion, one hundred thirty-two million, three hundred twenty-one thousand, three hundred seven".