21103102303 has 32 divisors (see below), whose sum is σ = 23258949120. Its totient is φ = 19066629120.

The previous prime is 21103102297. The next prime is 21103102309. The reversal of 21103102303 is 30320130112.

It is an interprime number because it is at equal distance from previous prime (21103102297) and next prime (21103102309).

It is a cyclic number.

It is not a de Polignac number, because 21103102303 - 2⁵ = 21103102271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103102309) 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, 32022588 + ... + 32023246.

It is an arithmetic number, because the mean of its divisors is an integer number (726842160).

Almost surely, 2^21103102303 is an apocalyptic number.

21103102303 is a deficient number, since it is larger than the sum of its proper divisors (2155846817).

21103102303 is a wasteful number, since it uses less digits than its factorization.

21103102303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21103102303 its reverse (30320130112), we get a palindrome (51423232415).

The spelling of 21103102303 in words is "twenty-one billion, one hundred three million, one hundred two thousand, three hundred three".