21330021110 has 32 divisors (see below), whose sum is σ = 40968430560. Its totient is φ = 7972224768.

The previous prime is 21330021077. The next prime is 21330021121. The reversal of 21330021110 is 1112003312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 755057 + ... + 782796.

It is an arithmetic number, because the mean of its divisors is an integer number (1280263455).

Almost surely, 2^21330021110 is an apocalyptic number.

21330021110 is a deficient number, since it is larger than the sum of its proper divisors (19638409450).

21330021110 is a wasteful number, since it uses less digits than its factorization.

21330021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537952.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21330021110 its reverse (1112003312), we get a palindrome (22442024422).

The spelling of 21330021110 in words is "twenty-one billion, three hundred thirty million, twenty-one thousand, one hundred ten".