21031332130 has 8 divisors (see below), whose sum is σ = 37856397852. Its totient is φ = 8412532848.

The previous prime is 21031332103. The next prime is 21031332131. The reversal of 21031332130 is 3123313012.

It can be written as a sum of positive squares in 2 ways, for example, as 20118869281 + 912462849 = 141841^2 + 30207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21031332098 and 21031332107.

It is not an unprimeable number, because it can be changed into a prime (21031332131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051566597 + ... + 1051566616.

Almost surely, 2^21031332130 is an apocalyptic number.

21031332130 is a deficient number, since it is larger than the sum of its proper divisors (16825065722).

21031332130 is a wasteful number, since it uses less digits than its factorization.

21031332130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103133220.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21031332130 its reverse (3123313012), we get a palindrome (24154645142).

The spelling of 21031332130 in words is "twenty-one billion, thirty-one million, three hundred thirty-two thousand, one hundred thirty".