21134131899 has 16 divisors (see below), whose sum is σ = 28350067200. Its totient is φ = 14004065376.

The previous prime is 21134131897. The next prime is 21134131937. The reversal of 21134131899 is 99813143112.

It is not a de Polignac number, because 21134131899 - 2¹ = 21134131897 is a prime.

It is a super-2 number, since 2×21134131899² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21134131899.

It is not an unprimeable number, because it can be changed into a prime (21134131897) 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 in 15 ways as a sum of consecutive naturals, for example, 301422 + ... + 364860.

It is an arithmetic number, because the mean of its divisors is an integer number (1771879200).

Almost surely, 2^21134131899 is an apocalyptic number.

21134131899 is a deficient number, since it is larger than the sum of its proper divisors (7215935301).

21134131899 is a wasteful number, since it uses less digits than its factorization.

21134131899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64114.

The product of its digits is 46656, while the sum is 42.

The spelling of 21134131899 in words is "twenty-one billion, one hundred thirty-four million, one hundred thirty-one thousand, eight hundred ninety-nine".