21131132099 has 32 divisors (see below), whose sum is σ = 27028560384. Its totient is φ = 16044238080.

The previous prime is 21131132069. The next prime is 21131132119. The reversal of 21131132099 is 99023113112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21131132099 - 2¹² = 21131128003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21131132069) 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 31 ways as a sum of consecutive naturals, for example, 443897 + ... + 489189.

It is an arithmetic number, because the mean of its divisors is an integer number (844642512).

Almost surely, 2^21131132099 is an apocalyptic number.

21131132099 is a deficient number, since it is larger than the sum of its proper divisors (5897428285).

21131132099 is a wasteful number, since it uses less digits than its factorization.

21131132099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45467.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 21131132099 in words is "twenty-one billion, one hundred thirty-one million, one hundred thirty-two thousand, ninety-nine".