21611775041612 has 12 divisors (see below), whose sum is σ = 43223550083280. Its totient is φ = 9262189303536.

The previous prime is 21611775041603. The next prime is 21611775041629. The reversal of 21611775041612 is 21614057711612.

21611775041612 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

21611775041612 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385924554287 + ... + 385924554342.

It is an arithmetic number, because the mean of its divisors is an integer number (3601962506940).

Almost surely, 2^{21611775041612} is an apocalyptic number.

It is an amenable number.

21611775041612 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21611775041612 is a wasteful number, since it uses less digits than its factorization.

21611775041612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771849108640 (or 771849108638 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 21611775041612 in words is "twenty-one trillion, six hundred eleven billion, seven hundred seventy-five million, forty-one thousand, six hundred twelve".