21204202231132 has 48 divisors (see below), whose sum is σ = 39570763534848. Its totient is φ = 9907418085120.

The previous prime is 21204202231129. The next prime is 21204202231169. The reversal of 21204202231132 is 23113220240212.

It is a junction number, because it is equal to n+sod(n) for n = 21204202231097 and 21204202231106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3793507 + ... + 7536517.

It is an arithmetic number, because the mean of its divisors is an integer number (824390906976).

Almost surely, 2^{21204202231132} is an apocalyptic number.

It is an amenable number.

21204202231132 is a deficient number, since it is larger than the sum of its proper divisors (18366561303716).

21204202231132 is a wasteful number, since it uses less digits than its factorization.

21204202231132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743626 (or 3743624 counting only the distinct ones).

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

Adding to 21204202231132 its reverse (23113220240212), we get a palindrome (44317422471344).

The spelling of 21204202231132 in words is "twenty-one trillion, two hundred four billion, two hundred two million, two hundred thirty-one thousand, one hundred thirty-two".