21113015132 has 12 divisors (see below), whose sum is σ = 40306665336. Its totient is φ = 9596825040.

The previous prime is 21113015129. The next prime is 21113015141. The reversal of 21113015132 is 23151031112.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 239920583 + ... + 239920670.

It is an arithmetic number, because the mean of its divisors is an integer number (3358888778).

Almost surely, 2^21113015132 is an apocalyptic number.

21113015132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21113015132 is a deficient number, since it is larger than the sum of its proper divisors (19193650204).

21113015132 is a wasteful number, since it uses less digits than its factorization.

21113015132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479841268 (or 479841266 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 21113015132 its reverse (23151031112), we get a palindrome (44264046244).

The spelling of 21113015132 in words is "twenty-one billion, one hundred thirteen million, fifteen thousand, one hundred thirty-two".