21213113132 has 24 divisors (see below), whose sum is σ = 38484980352. Its totient is φ = 10220342400.

The previous prime is 21213113113. The next prime is 21213113147. The reversal of 21213113132 is 23131131212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338219 + ... + 396002.

It is an arithmetic number, because the mean of its divisors is an integer number (1603540848).

Almost surely, 2^21213113132 is an apocalyptic number.

It is an amenable number.

21213113132 is a deficient number, since it is larger than the sum of its proper divisors (17271867220).

21213113132 is a wasteful number, since it uses less digits than its factorization.

21213113132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734489 (or 734487 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 21213113132 its reverse (23131131212), we get a palindrome (44344244344).

The spelling of 21213113132 in words is "twenty-one billion, two hundred thirteen million, one hundred thirteen thousand, one hundred thirty-two".