21234131303 has 32 divisors (see below), whose sum is σ = 26942630400. Its totient is φ = 16254812160.

The previous prime is 21234131297. The next prime is 21234131309. The reversal of 21234131303 is 30313143212.

It is an interprime number because it is at equal distance from previous prime (21234131297) and next prime (21234131309).

It is a cyclic number.

It is not a de Polignac number, because 21234131303 - 2²⁰ = 21233082727 is a prime.

It is a super-3 number, since 3×21234131303³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234131309) 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, 1437248 + ... + 1451946.

It is an arithmetic number, because the mean of its divisors is an integer number (841957200).

Almost surely, 2^21234131303 is an apocalyptic number.

21234131303 is a deficient number, since it is larger than the sum of its proper divisors (5708499097).

21234131303 is a wasteful number, since it uses less digits than its factorization.

21234131303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15047.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21234131303 its reverse (30313143212), we get a palindrome (51547274515).

The spelling of 21234131303 in words is "twenty-one billion, two hundred thirty-four million, one hundred thirty-one thousand, three hundred three".