21235694217088 has 64 divisors (see below), whose sum is σ = 45560698056720. Its totient is φ = 9800886251520.

The previous prime is 21235694217079. The next prime is 21235694217121. The reversal of 21235694217088 is 88071249653212.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105292023 + ... + 105493513.

It is a 1-persistent number, because it is pandigital, but 2⋅21235694217088 = 42471388434176 is not.

Almost surely, 2^{21235694217088} is an apocalyptic number.

It is an amenable number.

21235694217088 is an abundant number, since it is smaller than the sum of its proper divisors (24325003839632).

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

21235694217088 is a wasteful number, since it uses less digits than its factorization.

21235694217088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264855 (or 264843 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 21235694217088 in words is "twenty-one trillion, two hundred thirty-five billion, six hundred ninety-four million, two hundred seventeen thousand, eighty-eight".