1260122221 has 2 divisors, whose sum is σ = 1260122222. Its totient is φ = 1260122220.

The previous prime is 1260122219. The next prime is 1260122257. The reversal of 1260122221 is 1222210621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 830016100 + 430106121 = 28810^2 + 20739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260122221 - 2¹ = 1260122219 is a prime.

Together with 1260122219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1260122261) 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, 630061110 + 630061111.

It is an arithmetic number, because the mean of its divisors is an integer number (630061111).

Almost surely, 2^1260122221 is an apocalyptic number.

It is an amenable number.

1260122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260122221 is an equidigital number, since it uses as much as digits as its factorization.

1260122221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1260122221 is about 35498.2002501535. The cubic root of 1260122221 is about 1080.1172200729.

Adding to 1260122221 its reverse (1222210621), we get a palindrome (2482332842).

The spelling of 1260122221 in words is "one billion, two hundred sixty million, one hundred twenty-two thousand, two hundred twenty-one".