21134663162881 has 8 divisors (see below), whose sum is σ = 21169175797728. Its totient is φ = 21100174392000.

The previous prime is 21134663162857. The next prime is 21134663162887. The reversal of 21134663162881 is 18826136643112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21134663162881 - 2⁹ = 21134663162369 is a prime.

It is a super-3 number, since 3×21134663162881³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134663162887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4192855 + ... + 7736236.

It is an arithmetic number, because the mean of its divisors is an integer number (2646146974716).

Almost surely, 2^{21134663162881} is an apocalyptic number.

It is an amenable number.

21134663162881 is a deficient number, since it is larger than the sum of its proper divisors (34512634847).

21134663162881 is a wasteful number, since it uses less digits than its factorization.

21134663162881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11931983.

The product of its digits is 1990656, while the sum is 52.

The spelling of 21134663162881 in words is "twenty-one trillion, one hundred thirty-four billion, six hundred sixty-three million, one hundred sixty-two thousand, eight hundred eighty-one".