21616072252267 has 4 divisors (see below), whose sum is σ = 21876506857800. Its totient is φ = 21355637646736.

The previous prime is 21616072252259. The next prime is 21616072252277. The reversal of 21616072252267 is 76225227061612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21616072252267 - 2³ = 21616072252259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21616072252267.

It is not an unprimeable number, because it can be changed into a prime (21616072252237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130217302642 + ... + 130217302807.

It is an arithmetic number, because the mean of its divisors is an integer number (5469126714450).

Almost surely, 2^{21616072252267} is an apocalyptic number.

21616072252267 is a deficient number, since it is larger than the sum of its proper divisors (260434605533).

21616072252267 is an equidigital number, since it uses as much as digits as its factorization.

21616072252267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260434605532.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 21616072252267 in words is "twenty-one trillion, six hundred sixteen billion, seventy-two million, two hundred fifty-two thousand, two hundred sixty-seven".