21101066610 has 64 divisors (see below), whose sum is σ = 55047952512. Its totient is φ = 5145555456.

The previous prime is 21101066579. The next prime is 21101066627. The reversal of 21101066610 is 1666010112.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211099 + ... + 294558.

It is an arithmetic number, because the mean of its divisors is an integer number (860124258).

Almost surely, 2^21101066610 is an apocalyptic number.

21101066610 is an abundant number, since it is smaller than the sum of its proper divisors (33946885902).

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

21101066610 is a wasteful number, since it uses less digits than its factorization.

21101066610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505787.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 21101066610 its reverse (1666010112), we get a palindrome (22767076722).

The spelling of 21101066610 in words is "twenty-one billion, one hundred one million, sixty-six thousand, six hundred ten".