21232131303 has 16 divisors (see below), whose sum is σ = 28863216000. Its totient is φ = 13878262944.

The previous prime is 21232131287. The next prime is 21232131341. The reversal of 21232131303 is 30313123212.

It is not a de Polignac number, because 21232131303 - 2⁴ = 21232131287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21232131303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232131203) 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, 193800 + ... + 282882.

It is an arithmetic number, because the mean of its divisors is an integer number (1803951000).

Almost surely, 2^21232131303 is an apocalyptic number.

21232131303 is a deficient number, since it is larger than the sum of its proper divisors (7631084697).

21232131303 is a wasteful number, since it uses less digits than its factorization.

21232131303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90638.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21232131303 its reverse (30313123212), we get a palindrome (51545254515).

The spelling of 21232131303 in words is "twenty-one billion, two hundred thirty-two million, one hundred thirty-one thousand, three hundred three".