1223001281 has 2 divisors, whose sum is σ = 1223001282. Its totient is φ = 1223001280.

The previous prime is 1223001217. The next prime is 1223001319. The reversal of 1223001281 is 1821003221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1187491600 + 35509681 = 34460^2 + 5959^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223001281 - 2⁶ = 1223001217 is a prime.

It is a super-2 number, since 2×1223001281² = 2991464266655281922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1223001881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611500640 + 611500641.

It is an arithmetic number, because the mean of its divisors is an integer number (611500641).

Almost surely, 2^1223001281 is an apocalyptic number.

It is an amenable number.

1223001281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223001281 is an equidigital number, since it uses as much as digits as its factorization.

1223001281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1223001281 is about 34971.4352150437. The cubic root of 1223001281 is about 1069.4052306376.

The spelling of 1223001281 in words is "one billion, two hundred twenty-three million, one thousand, two hundred eighty-one".