21131140224415 has 32 divisors (see below), whose sum is σ = 28988614549440. Its totient is φ = 14648865429504.

The previous prime is 21131140224379. The next prime is 21131140224463. The reversal of 21131140224415 is 51442204113112.

It is a cyclic number.

It is not a de Polignac number, because 21131140224415 - 2³⁹ = 20581384410527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24150109 + ... + 25009798.

It is an arithmetic number, because the mean of its divisors is an integer number (905894204670).

Almost surely, 2^{21131140224415} is an apocalyptic number.

21131140224415 is a deficient number, since it is larger than the sum of its proper divisors (7857474325025).

21131140224415 is a wasteful number, since it uses less digits than its factorization.

21131140224415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49160331.

The product of its (nonzero) digits is 7680, while the sum is 31.

Adding to 21131140224415 its reverse (51442204113112), we get a palindrome (72573344337527).

The spelling of 21131140224415 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred forty million, two hundred twenty-four thousand, four hundred fifteen".