21231331303 has 16 divisors (see below), whose sum is σ = 27266996736. Its totient is φ = 16068048480.

The previous prime is 21231331283. The next prime is 21231331337. The reversal of 21231331303 is 30313313212.

It is a cyclic number.

It is not a de Polignac number, because 21231331303 - 2¹³ = 21231323111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231301303) 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, 5069893 + ... + 5074078.

It is an arithmetic number, because the mean of its divisors is an integer number (1704187296).

Almost surely, 2^21231331303 is an apocalyptic number.

21231331303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21231331303 is a deficient number, since it is larger than the sum of its proper divisors (6035665433).

21231331303 is a wasteful number, since it uses less digits than its factorization.

21231331303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10144014.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21231331303 its reverse (30313313212), we get a palindrome (51544644515).

The spelling of 21231331303 in words is "twenty-one billion, two hundred thirty-one million, three hundred thirty-one thousand, three hundred three".