21142119899 has 2 divisors, whose sum is σ = 21142119900. Its totient is φ = 21142119898.

The previous prime is 21142119881. The next prime is 21142119931. The reversal of 21142119899 is 99891124112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21142119899 is a prime.

It is not a weakly prime, because it can be changed into another prime (21142119499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571059949 + 10571059950.

It is an arithmetic number, because the mean of its divisors is an integer number (10571059950).

Almost surely, 2^21142119899 is an apocalyptic number.

21142119899 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142119899 is an equidigital number, since it uses as much as digits as its factorization.

21142119899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 47.

The spelling of 21142119899 in words is "twenty-one billion, one hundred forty-two million, one hundred nineteen thousand, eight hundred ninety-nine".