21131200324 has 24 divisors (see below), whose sum is σ = 40087936448. Its totient is φ = 9688269600.

The previous prime is 21131200301. The next prime is 21131200327. The reversal of 21131200324 is 42300213112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21131200327) 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, 1337742 + ... + 1353445.

Almost surely, 2^21131200324 is an apocalyptic number.

It is an amenable number.

21131200324 is a deficient number, since it is larger than the sum of its proper divisors (18956736124).

21131200324 is a wasteful number, since it uses less digits than its factorization.

21131200324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691355 (or 2691353 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21131200324 its reverse (42300213112), we get a palindrome (63431413436).

The spelling of 21131200324 in words is "twenty-one billion, one hundred thirty-one million, two hundred thousand, three hundred twenty-four".