21232131302 has 4 divisors (see below), whose sum is σ = 31848196956. Its totient is φ = 10616065650.

The previous prime is 21232131287. The next prime is 21232131341. The reversal of 21232131302 is 20313123212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5308032824 + ... + 5308032827.

It is an arithmetic number, because the mean of its divisors is an integer number (7962049239).

Almost surely, 2^21232131302 is an apocalyptic number.

21232131302 is a deficient number, since it is larger than the sum of its proper divisors (10616065654).

21232131302 is a wasteful number, since it uses less digits than its factorization.

21232131302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616065653.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21232131302 its reverse (20313123212), we get a palindrome (41545254514).

The spelling of 21232131302 in words is "twenty-one billion, two hundred thirty-two million, one hundred thirty-one thousand, three hundred two".