21412133387 has 2 divisors, whose sum is σ = 21412133388. Its totient is φ = 21412133386.

The previous prime is 21412133381. The next prime is 21412133389. The reversal of 21412133387 is 78333121412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21412133387 - 2²² = 21407939083 is a prime.

Together with 21412133389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21412133381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706066693 + 10706066694.

It is an arithmetic number, because the mean of its divisors is an integer number (10706066694).

Almost surely, 2^21412133387 is an apocalyptic number.

21412133387 is a deficient number, since it is larger than the sum of its proper divisors (1).

21412133387 is an equidigital number, since it uses as much as digits as its factorization.

21412133387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

Adding to 21412133387 its reverse (78333121412), we get a palindrome (99745254799).

The spelling of 21412133387 in words is "twenty-one billion, four hundred twelve million, one hundred thirty-three thousand, three hundred eighty-seven".