21343100407 has 2 divisors, whose sum is σ = 21343100408. Its totient is φ = 21343100406.

The previous prime is 21343100327. The next prime is 21343100423. The reversal of 21343100407 is 70400134312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21343100407 - 2²⁷ = 21208882679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21343100497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671550203 + 10671550204.

It is an arithmetic number, because the mean of its divisors is an integer number (10671550204).

Almost surely, 2^21343100407 is an apocalyptic number.

21343100407 is a deficient number, since it is larger than the sum of its proper divisors (1).

21343100407 is an equidigital number, since it uses as much as digits as its factorization.

21343100407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 21343100407 its reverse (70400134312), we get a palindrome (91743234719).

The spelling of 21343100407 in words is "twenty-one billion, three hundred forty-three million, one hundred thousand, four hundred seven".