21664030211116 has 6 divisors (see below), whose sum is σ = 37912052869460. Its totient is φ = 10832015105556.

The previous prime is 21664030211111. The next prime is 21664030211123. The reversal of 21664030211116 is 61111203046612.

It is not an unprimeable number, because it can be changed into a prime (21664030211111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2708003776386 + ... + 2708003776393.

Almost surely, 2^{21664030211116} is an apocalyptic number.

It is an amenable number.

21664030211116 is a deficient number, since it is larger than the sum of its proper divisors (16248022658344).

21664030211116 is a wasteful number, since it uses less digits than its factorization.

21664030211116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5416007552783 (or 5416007552781 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

Adding to 21664030211116 its reverse (61111203046612), we get a palindrome (82775233257728).

The spelling of 21664030211116 in words is "twenty-one trillion, six hundred sixty-four billion, thirty million, two hundred eleven thousand, one hundred sixteen".