130210921 has 3 divisors (see below), whose sum is σ = 130222333. Its totient is φ = 130199510.

The previous prime is 130210909. The next prime is 130210937. The reversal of 130210921 is 129012031.

The square root of 130210921 is 11411.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 130210921 - 2¹³ = 130202729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130210901) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5706 + ... + 17116.

Almost surely, 2^130210921 is an apocalyptic number.

130210921 is the 11411-st square number.

130210921 is the 5706-th centered octagonal number.

It is an amenable number.

130210921 is a deficient number, since it is larger than the sum of its proper divisors (11412).

130210921 is an frugal number, since it uses more digits than its factorization.

130210921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22822 (or 11411 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The cubic root of 130210921 is about 506.8535238673.

Adding to 130210921 its reverse (129012031), we get a palindrome (259222952).

It can be divided in two parts, 130210 and 921, that added together give a palindrome (131131).

The spelling of 130210921 in words is "one hundred thirty million, two hundred ten thousand, nine hundred twenty-one".