21119166004405 has 12 divisors (see below), whose sum is σ = 29480631728940. Its totient is φ = 14481713831424.

The previous prime is 21119166004379. The next prime is 21119166004439. The reversal of 21119166004405 is 50440066191112.

It can be written as a sum of positive squares in 2 ways, for example, as 5676168065841 + 15442997938564 = 2382471^2 + 3929758^2 .

It is not a de Polignac number, because 21119166004405 - 2⁹ = 21119166003893 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43100338540 + ... + 43100339029.

It is an arithmetic number, because the mean of its divisors is an integer number (2456719310745).

Almost surely, 2^{21119166004405} is an apocalyptic number.

It is an amenable number.

21119166004405 is a deficient number, since it is larger than the sum of its proper divisors (8361465724535).

21119166004405 is an equidigital number, since it uses as much as digits as its factorization.

21119166004405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86200677588 (or 86200677581 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 21119166004405 in words is "twenty-one trillion, one hundred nineteen billion, one hundred sixty-six million, four thousand, four hundred five".