21115321434650 has 96 divisors (see below), whose sum is σ = 41849168088960. Its totient is φ = 7898912000000.

The previous prime is 21115321434637. The next prime is 21115321434671. The reversal of 21115321434650 is 5643412351112.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85624025 + ... + 85870275.

It is an arithmetic number, because the mean of its divisors is an integer number (435928834260).

Almost surely, 2^{21115321434650} is an apocalyptic number.

21115321434650 is a deficient number, since it is larger than the sum of its proper divisors (20733846654310).

21115321434650 is a wasteful number, since it uses less digits than its factorization.

21115321434650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246920 (or 246915 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 21115321434650 its reverse (5643412351112), we get a palindrome (26758733785762).

The spelling of 21115321434650 in words is "twenty-one trillion, one hundred fifteen billion, three hundred twenty-one million, four hundred thirty-four thousand, six hundred fifty".