21130414399 has 2 divisors, whose sum is σ = 21130414400. Its totient is φ = 21130414398.

The previous prime is 21130414381. The next prime is 21130414421. The reversal of 21130414399 is 99341403112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21130414399 - 2⁷ = 21130414271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130414379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565207199 + 10565207200.

It is an arithmetic number, because the mean of its divisors is an integer number (10565207200).

Almost surely, 2^21130414399 is an apocalyptic number.

21130414399 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130414399 is an equidigital number, since it uses as much as digits as its factorization.

21130414399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 21130414399 in words is "twenty-one billion, one hundred thirty million, four hundred fourteen thousand, three hundred ninety-nine".