21213231302 has 16 divisors (see below), whose sum is σ = 33535924800. Its totient is φ = 10035968040.

The previous prime is 21213231289. The next prime is 21213231337. The reversal of 21213231302 is 20313231212.

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, 313352 + ... + 374987.

It is an arithmetic number, because the mean of its divisors is an integer number (2095995300).

Almost surely, 2^21213231302 is an apocalyptic number.

21213231302 is a deficient number, since it is larger than the sum of its proper divisors (12322693498).

21213231302 is a wasteful number, since it uses less digits than its factorization.

21213231302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689171.

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

Adding to 21213231302 its reverse (20313231212), we get a palindrome (41526462514).

The spelling of 21213231302 in words is "twenty-one billion, two hundred thirteen million, two hundred thirty-one thousand, three hundred two".