21201112011110 has 32 divisors (see below), whose sum is σ = 38541486052800. Its totient is φ = 8396122089600.

The previous prime is 21201112011071. The next prime is 21201112011187. The reversal of 21201112011110 is 1111021110212.

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, 23914751 + ... + 24785429.

It is an arithmetic number, because the mean of its divisors is an integer number (1204421439150).

Almost surely, 2^{21201112011110} is an apocalyptic number.

21201112011110 is a deficient number, since it is larger than the sum of its proper divisors (17340374041690).

21201112011110 is a wasteful number, since it uses less digits than its factorization.

21201112011110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894896.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21201112011110 its reverse (1111021110212), we get a palindrome (22312133121322).

The spelling of 21201112011110 in words is "twenty-one trillion, two hundred one billion, one hundred twelve million, eleven thousand, one hundred ten".