21230431099 has 8 divisors (see below), whose sum is σ = 21964399920. Its totient is φ = 20496588000.

The previous prime is 21230431097. The next prime is 21230431153. The reversal of 21230431099 is 99013403212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21230431099 - 2¹ = 21230431097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230431093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424389 + ... + 471769.

It is an arithmetic number, because the mean of its divisors is an integer number (2745549990).

Almost surely, 2^21230431099 is an apocalyptic number.

21230431099 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21230431099 is a deficient number, since it is larger than the sum of its proper divisors (733968821).

21230431099 is a wasteful number, since it uses less digits than its factorization.

21230431099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62861.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 21230431099 in words is "twenty-one billion, two hundred thirty million, four hundred thirty-one thousand, ninety-nine".