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130251221 is a prime number
BaseRepresentation
bin1111100001101…
…11100111010101
3100002002110002022
413300313213111
5231321014341
620531422525
73141055112
oct760674725
9302073068
10130251221
1167583741
1237754a45
1320ca5c39
1413427909
15b67ce4b
hex7c379d5

130251221 has 2 divisors, whose sum is σ = 130251222. Its totient is φ = 130251220.

The previous prime is 130251203. The next prime is 130251223. The reversal of 130251221 is 122152031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109956196 + 20295025 = 10486^2 + 4505^2 .

It is a cyclic number.

It is not a de Polignac number, because 130251221 - 226 = 63142357 is a prime.

Together with 130251223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 130251221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130251223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65125610 + 65125611.

It is an arithmetic number, because the mean of its divisors is an integer number (65125611).

Almost surely, 2130251221 is an apocalyptic number.

It is an amenable number.

130251221 is a deficient number, since it is larger than the sum of its proper divisors (1).

130251221 is an equidigital number, since it uses as much as digits as its factorization.

130251221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 130251221 is about 11412.7657033692. The cubic root of 130251221 is about 506.9058084989.

The spelling of 130251221 in words is "one hundred thirty million, two hundred fifty-one thousand, two hundred twenty-one".