21611245223715 has 16 divisors (see below), whose sum is σ = 39517705552128. Its totient is φ = 9879426387936.

The previous prime is 21611245223699. The next prime is 21611245223723. The reversal of 21611245223715 is 51732254211612.

It is not a de Polignac number, because 21611245223715 - 2⁴ = 21611245223699 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102910691437 + ... + 102910691646.

It is an arithmetic number, because the mean of its divisors is an integer number (2469856597008).

Almost surely, 2^{21611245223715} is an apocalyptic number.

21611245223715 is a deficient number, since it is larger than the sum of its proper divisors (17906460328413).

21611245223715 is a wasteful number, since it uses less digits than its factorization.

21611245223715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205821383098.

The product of its digits is 201600, while the sum is 42.

The spelling of 21611245223715 in words is "twenty-one trillion, six hundred eleven billion, two hundred forty-five million, two hundred twenty-three thousand, seven hundred fifteen".