21103113333 has 16 divisors (see below), whose sum is σ = 28621209600. Its totient is φ = 13826993520.

The previous prime is 21103113329. The next prime is 21103113359. The reversal of 21103113333 is 33331130112.

It is not a de Polignac number, because 21103113333 - 2² = 21103113329 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103113233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 894418 + ... + 917708.

It is an arithmetic number, because the mean of its divisors is an integer number (1788825600).

Almost surely, 2^21103113333 is an apocalyptic number.

It is an amenable number.

21103113333 is a deficient number, since it is larger than the sum of its proper divisors (7518096267).

21103113333 is a wasteful number, since it uses less digits than its factorization.

21103113333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28472.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 21103113333 its reverse (33331130112), we get a palindrome (54434243445).

The spelling of 21103113333 in words is "twenty-one billion, one hundred three million, one hundred thirteen thousand, three hundred thirty-three".