21302120132 has 12 divisors (see below), whose sum is σ = 37281242796. Its totient is φ = 10650336480.

The previous prime is 21302120129. The next prime is 21302120171. The reversal of 21302120132 is 23102120312.

It can be written as a sum of positive squares in 2 ways, for example, as 9995200576 + 11306919556 = 99976^2 + 106334^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21302120132.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111719 + ... + 234702.

It is an arithmetic number, because the mean of its divisors is an integer number (3106770233).

Almost surely, 2^21302120132 is an apocalyptic number.

It is an amenable number.

21302120132 is a deficient number, since it is larger than the sum of its proper divisors (15979122664).

21302120132 is a wasteful number, since it uses less digits than its factorization.

21302120132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361798 (or 361796 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21302120132 its reverse (23102120312), we get a palindrome (44404240444).

The spelling of 21302120132 in words is "twenty-one billion, three hundred two million, one hundred twenty thousand, one hundred thirty-two".