21401032307 has 2 divisors, whose sum is σ = 21401032308. Its totient is φ = 21401032306.

The previous prime is 21401032291. The next prime is 21401032319. The reversal of 21401032307 is 70323010412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21401032307 - 2⁴ = 21401032291 is a prime.

It is not a weakly prime, because it can be changed into another prime (21431032307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700516153 + 10700516154.

It is an arithmetic number, because the mean of its divisors is an integer number (10700516154).

Almost surely, 2^21401032307 is an apocalyptic number.

21401032307 is a deficient number, since it is larger than the sum of its proper divisors (1).

21401032307 is an equidigital number, since it uses as much as digits as its factorization.

21401032307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

Adding to 21401032307 its reverse (70323010412), we get a palindrome (91724042719).

The spelling of 21401032307 in words is "twenty-one billion, four hundred one million, thirty-two thousand, three hundred seven".