1013718221 has 2 divisors, whose sum is σ = 1013718222. Its totient is φ = 1013718220.

The previous prime is 1013718187. The next prime is 1013718263. The reversal of 1013718221 is 1228173101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 789048100 + 224670121 = 28090^2 + 14989^2 .

It is an emirp because it is prime and its reverse (1228173101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1013718221 - 2⁶ = 1013718157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1013718821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506859110 + 506859111.

It is an arithmetic number, because the mean of its divisors is an integer number (506859111).

Almost surely, 2^1013718221 is an apocalyptic number.

It is an amenable number.

1013718221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013718221 is an equidigital number, since it uses as much as digits as its factorization.

1013718221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 1013718221 is about 31838.9418951070. The cubic root of 1013718221 is about 1004.5519882959.

The spelling of 1013718221 in words is "one billion, thirteen million, seven hundred eighteen thousand, two hundred twenty-one".