21110033012 has 12 divisors (see below), whose sum is σ = 36943706436. Its totient is φ = 10554688320.

The previous prime is 21110032997. The next prime is 21110033053. The reversal of 21110033012 is 21033001112.

It can be written as a sum of positive squares in 2 ways, for example, as 18641533156 + 2468499856 = 136534^2 + 49684^2 .

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, 115562 + ... + 235742.

It is an arithmetic number, because the mean of its divisors is an integer number (3078642203).

Almost surely, 2^21110033012 is an apocalyptic number.

It is an amenable number.

21110033012 is a deficient number, since it is larger than the sum of its proper divisors (15833673424).

21110033012 is a wasteful number, since it uses less digits than its factorization.

21110033012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164098 (or 164096 counting only the distinct ones).

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

Adding to 21110033012 its reverse (21033001112), we get a palindrome (42143034124).

The spelling of 21110033012 in words is "twenty-one billion, one hundred ten million, thirty-three thousand, twelve".