21120011524 has 12 divisors (see below), whose sum is σ = 36961254400. Its totient is φ = 10559653128.

The previous prime is 21120011519. The next prime is 21120011543. The reversal of 21120011524 is 42511002112.

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 3 ways as a sum of consecutive naturals, for example, 83917 + ... + 221995.

Almost surely, 2^21120011524 is an apocalyptic number.

It is an amenable number.

21120011524 is a deficient number, since it is larger than the sum of its proper divisors (15841242876).

21120011524 is a wasteful number, since it uses less digits than its factorization.

21120011524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176322 (or 176320 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 21120011524 its reverse (42511002112), we get a palindrome (63631013636).

The spelling of 21120011524 in words is "twenty-one billion, one hundred twenty million, eleven thousand, five hundred twenty-four".