21113020103 has 32 divisors (see below), whose sum is σ = 25840539648. Its totient is φ = 16838208000.

The previous prime is 21113020099. The next prime is 21113020129. The reversal of 21113020103 is 30102031112.

It is a cyclic number.

It is not a de Polignac number, because 21113020103 - 2² = 21113020099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113020193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14794676 + ... + 14796102.

It is an arithmetic number, because the mean of its divisors is an integer number (807516864).

Almost surely, 2^21113020103 is an apocalyptic number.

21113020103 is a deficient number, since it is larger than the sum of its proper divisors (4727519545).

21113020103 is a wasteful number, since it uses less digits than its factorization.

21113020103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783.

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

Adding to 21113020103 its reverse (30102031112), we get a palindrome (51215051215).

The spelling of 21113020103 in words is "twenty-one billion, one hundred thirteen million, twenty thousand, one hundred three".