21031130132 has 24 divisors (see below), whose sum is σ = 37231101600. Its totient is φ = 10394135136.

The previous prime is 21031130089. The next prime is 21031130177. The reversal of 21031130132 is 23103113012.

It is a self number, because there is not a number n which added to its sum of digits gives 21031130132.

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, 125123 + ... + 240245.

It is an arithmetic number, because the mean of its divisors is an integer number (1551295900).

Almost surely, 2^21031130132 is an apocalyptic number.

It is an amenable number.

21031130132 is a deficient number, since it is larger than the sum of its proper divisors (16199971468).

21031130132 is a wasteful number, since it uses less digits than its factorization.

21031130132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115655 (or 115653 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21031130132 its reverse (23103113012), we get a palindrome (44134243144).

The spelling of 21031130132 in words is "twenty-one billion, thirty-one million, one hundred thirty thousand, one hundred thirty-two".