21411112303 has 16 divisors (see below), whose sum is σ = 25040508480. Its totient is φ = 17927410176.

The previous prime is 21411112279. The next prime is 21411112309. The reversal of 21411112303 is 30321111412.

It is a cyclic number.

It is not a de Polignac number, because 21411112303 - 2²¹ = 21409015151 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 (21411112309) 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, 41050 + ... + 210967.

It is an arithmetic number, because the mean of its divisors is an integer number (1565031780).

Almost surely, 2^21411112303 is an apocalyptic number.

21411112303 is a deficient number, since it is larger than the sum of its proper divisors (3629396177).

21411112303 is a wasteful number, since it uses less digits than its factorization.

21411112303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252306.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21411112303 its reverse (30321111412), we get a palindrome (51732223715).

The spelling of 21411112303 in words is "twenty-one billion, four hundred eleven million, one hundred twelve thousand, three hundred three".