21124011315 has 32 divisors (see below), whose sum is σ = 36884160000. Its totient is φ = 10238289920.

The previous prime is 21124011313. The next prime is 21124011331. The reversal of 21124011315 is 51311042112.

It is not a de Polignac number, because 21124011315 - 2¹ = 21124011313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21124011291 and 21124011300.

It is not an unprimeable number, because it can be changed into a prime (21124011313) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 473491 + ... + 516179.

It is an arithmetic number, because the mean of its divisors is an integer number (1152630000).

Almost surely, 2^21124011315 is an apocalyptic number.

21124011315 is a deficient number, since it is larger than the sum of its proper divisors (15760148685).

21124011315 is a wasteful number, since it uses less digits than its factorization.

21124011315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45707.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 21124011315 its reverse (51311042112), we get a palindrome (72435053427).

The spelling of 21124011315 in words is "twenty-one billion, one hundred twenty-four million, eleven thousand, three hundred fifteen".