21202112132 has 12 divisors (see below), whose sum is σ = 37129137360. Its totient is φ = 10593787176.

The previous prime is 21202112101. The next prime is 21202112153. The reversal of 21202112132 is 23121120212.

It is a self number, because there is not a number n which added to its sum of digits gives 21202112132.

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, 1810658 + ... + 1822329.

It is an arithmetic number, because the mean of its divisors is an integer number (3094094780).

Almost surely, 2^21202112132 is an apocalyptic number.

It is an amenable number.

21202112132 is a deficient number, since it is larger than the sum of its proper divisors (15927025228).

21202112132 is a wasteful number, since it uses less digits than its factorization.

21202112132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634450 (or 3634448 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21202112132 its reverse (23121120212), we get a palindrome (44323232344).

The spelling of 21202112132 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, one hundred thirty-two".