21231213302 has 16 divisors (see below), whose sum is σ = 34309790592. Its totient is φ = 9795245760.

The previous prime is 21231213299. The next prime is 21231213329. The reversal of 21231213302 is 20331213212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87974 + ... + 224057.

It is an arithmetic number, because the mean of its divisors is an integer number (2144361912).

Almost surely, 2^21231213302 is an apocalyptic number.

21231213302 is a deficient number, since it is larger than the sum of its proper divisors (13078577290).

21231213302 is a wasteful number, since it uses less digits than its factorization.

21231213302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314663.

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

Adding to 21231213302 its reverse (20331213212), we get a palindrome (41562426514).

The spelling of 21231213302 in words is "twenty-one billion, two hundred thirty-one million, two hundred thirteen thousand, three hundred two".