21204102213232 has 20 divisors (see below), whose sum is σ = 41086812815856. Its totient is φ = 10601053744640.

The previous prime is 21204102213127. The next prime is 21204102213253. The reversal of 21204102213232 is 23231220140212.

It is a super-2 number, since 2×21204102213232² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21204102213197 and 21204102213206.

It is a congruent number.

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, 62159713 + ... + 62499904.

Almost surely, 2^{21204102213232} is an apocalyptic number.

It is an amenable number.

21204102213232 is a deficient number, since it is larger than the sum of its proper divisors (19882710602624).

21204102213232 is a wasteful number, since it uses less digits than its factorization.

21204102213232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124670256 (or 124670250 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21204102213232 its reverse (23231220140212), we get a palindrome (44435322353444).

The spelling of 21204102213232 in words is "twenty-one trillion, two hundred four billion, one hundred two million, two hundred thirteen thousand, two hundred thirty-two".