21021110221112 has 64 divisors (see below), whose sum is σ = 39776849884800. Its totient is φ = 10414429200000.

The previous prime is 21021110221093. The next prime is 21021110221193. The reversal of 21021110221112 is 21112201112012.

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, 1075734062 + ... + 1075753602.

It is an arithmetic number, because the mean of its divisors is an integer number (621513279450).

Almost surely, 2^{21021110221112} is an apocalyptic number.

It is an amenable number.

21021110221112 is a deficient number, since it is larger than the sum of its proper divisors (18755739663688).

21021110221112 is a wasteful number, since it uses less digits than its factorization.

21021110221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22548 (or 22544 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21021110221112 its reverse (21112201112012), we get a palindrome (42133311333124).

The spelling of 21021110221112 in words is "twenty-one trillion, twenty-one billion, one hundred ten million, two hundred twenty-one thousand, one hundred twelve".