21113132312 has 16 divisors (see below), whose sum is σ = 39588792360. Its totient is φ = 10556121024.

The previous prime is 21113132239. The next prime is 21113132323. The reversal of 21113132312 is 21323131112.

It is a happy number.

It is a super-4 number, since 4×21113132312⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235628 + ... + 312644.

Almost surely, 2^21113132312 is an apocalyptic number.

It is an amenable number.

21113132312 is a deficient number, since it is larger than the sum of its proper divisors (18475660048).

21113132312 is a wasteful number, since it uses less digits than its factorization.

21113132312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111290 (or 111286 counting only the distinct ones).

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

Adding to 21113132312 its reverse (21323131112), we get a palindrome (42436263424).

The spelling of 21113132312 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-two thousand, three hundred twelve".