130811621 has 2 divisors, whose sum is σ = 130811622. Its totient is φ = 130811620.

The previous prime is 130811567. The next prime is 130811627. The reversal of 130811621 is 126118031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129732100 + 1079521 = 11390^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 130811621 - 2¹⁴ = 130795237 is a prime.

It is a super-2 number, since 2×130811621² = 34223360377295282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130811627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65405810 + 65405811.

It is an arithmetic number, because the mean of its divisors is an integer number (65405811).

Almost surely, 2^130811621 is an apocalyptic number.

It is an amenable number.

130811621 is a deficient number, since it is larger than the sum of its proper divisors (1).

130811621 is an equidigital number, since it uses as much as digits as its factorization.

130811621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 130811621 is about 11437.2908068301. The cubic root of 130811621 is about 507.6317481725.

Adding to 130811621 its reverse (126118031), we get a palindrome (256929652).

The spelling of 130811621 in words is "one hundred thirty million, eight hundred eleven thousand, six hundred twenty-one".