1255422121 has 2 divisors, whose sum is σ = 1255422122. Its totient is φ = 1255422120.

The previous prime is 1255422089. The next prime is 1255422167. The reversal of 1255422121 is 1212245521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234819600 + 20602521 = 35140^2 + 4539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255422121 - 2⁵ = 1255422089 is a prime.

It is a super-2 number, since 2×1255422121² = 3152169403792277282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1255422191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627711060 + 627711061.

It is an arithmetic number, because the mean of its divisors is an integer number (627711061).

Almost surely, 2^1255422121 is an apocalyptic number.

It is an amenable number.

1255422121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255422121 is an equidigital number, since it uses as much as digits as its factorization.

1255422121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1600, while the sum is 25.

The square root of 1255422121 is about 35431.9364556892. The cubic root of 1255422121 is about 1078.7726457814.

Adding to 1255422121 its reverse (1212245521), we get a palindrome (2467667642).

The spelling of 1255422121 in words is "one billion, two hundred fifty-five million, four hundred twenty-two thousand, one hundred twenty-one".