1270250221 has 2 divisors, whose sum is σ = 1270250222. Its totient is φ = 1270250220.

The previous prime is 1270250213. The next prime is 1270250227. The reversal of 1270250221 is 1220520721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1180266025 + 89984196 = 34355^2 + 9486^2 .

It is a cyclic number.

It is not a de Polignac number, because 1270250221 - 2³ = 1270250213 is a prime.

It is a super-2 number, since 2×1270250221² = 3227071247901097682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1270250192 and 1270250201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1270250227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635125110 + 635125111.

It is an arithmetic number, because the mean of its divisors is an integer number (635125111).

Almost surely, 2^1270250221 is an apocalyptic number.

It is an amenable number.

1270250221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270250221 is an equidigital number, since it uses as much as digits as its factorization.

1270250221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 1270250221 is about 35640.5698747930. The cubic root of 1270250221 is about 1083.0032495163.

Adding to 1270250221 its reverse (1220520721), we get a palindrome (2490770942).

The spelling of 1270250221 in words is "one billion, two hundred seventy million, two hundred fifty thousand, two hundred twenty-one".