21110333012 has 24 divisors (see below), whose sum is σ = 37457995176. Its totient is φ = 10408117248.

The previous prime is 21110332937. The next prime is 21110333071. The reversal of 21110333012 is 21033301112.

It can be written as a sum of positive squares in 4 ways, for example, as 13216721296 + 7893611716 = 114964^2 + 88846^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2270918 + ... + 2280194.

It is an arithmetic number, because the mean of its divisors is an integer number (1560749799).

Almost surely, 2^21110333012 is an apocalyptic number.

It is an amenable number.

21110333012 is a deficient number, since it is larger than the sum of its proper divisors (16347662164).

21110333012 is a wasteful number, since it uses less digits than its factorization.

21110333012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17147 (or 17145 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21110333012 its reverse (21033301112), we get a palindrome (42143634124).

The spelling of 21110333012 in words is "twenty-one billion, one hundred ten million, three hundred thirty-three thousand, twelve".