32130100021 has 4 divisors (see below), whose sum is σ = 32130513792. Its totient is φ = 32129686252.

The previous prime is 32130099983. The next prime is 32130100027. The reversal of 32130100021 is 12000103123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12000103123 = 17 ⋅705888419.

It is a cyclic number.

It is not a de Polignac number, because 32130100021 - 2⁹ = 32130099509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32130099974 and 32130100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32130100027) 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, 51511 + ... + 258676.

It is an arithmetic number, because the mean of its divisors is an integer number (8032628448).

Almost surely, 2^32130100021 is an apocalyptic number.

It is an amenable number.

32130100021 is a deficient number, since it is larger than the sum of its proper divisors (413771).

32130100021 is a wasteful number, since it uses less digits than its factorization.

32130100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413770.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 32130100021 its reverse (12000103123), we get a palindrome (44130203144).

The spelling of 32130100021 in words is "thirty-two billion, one hundred thirty million, one hundred thousand, twenty-one".