1240095221 has 2 divisors, whose sum is σ = 1240095222. Its totient is φ = 1240095220.

The previous prime is 1240095191. The next prime is 1240095229. The reversal of 1240095221 is 1225900421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1232992996 + 7102225 = 35114^2 + 2665^2 .

It is an emirp because it is prime and its reverse (1225900421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240095221 - 2²⁶ = 1172986357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240095229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620047610 + 620047611.

It is an arithmetic number, because the mean of its divisors is an integer number (620047611).

Almost surely, 2^1240095221 is an apocalyptic number.

It is an amenable number.

1240095221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240095221 is an equidigital number, since it uses as much as digits as its factorization.

1240095221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1240095221 is about 35214.9857447082. The cubic root of 1240095221 is about 1074.3645701373.

Adding to 1240095221 its reverse (1225900421), we get a palindrome (2465995642).

The spelling of 1240095221 in words is "one billion, two hundred forty million, ninety-five thousand, two hundred twenty-one".