21001011110 has 8 divisors (see below), whose sum is σ = 37801820016. Its totient is φ = 8400404440.

The previous prime is 21001011089. The next prime is 21001011127. The reversal of 21001011110 is 1111010012.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050050546 + ... + 1050050565.

It is an arithmetic number, because the mean of its divisors is an integer number (4725227502).

Almost surely, 2^21001011110 is an apocalyptic number.

21001011110 is a deficient number, since it is larger than the sum of its proper divisors (16800808906).

21001011110 is a wasteful number, since it uses less digits than its factorization.

21001011110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100101118.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 21001011110 its reverse (1111010012), we get a palindrome (22112021122).

The spelling of 21001011110 in words is "twenty-one billion, one million, eleven thousand, one hundred ten".