1223121293 has 2 divisors, whose sum is σ = 1223121294. Its totient is φ = 1223121292.

The previous prime is 1223121281. The next prime is 1223121299. The reversal of 1223121293 is 3921213221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1183153609 + 39967684 = 34397^2 + 6322^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223121293 - 2¹² = 1223117197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223121299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611560646 + 611560647.

It is an arithmetic number, because the mean of its divisors is an integer number (611560647).

Almost surely, 2^1223121293 is an apocalyptic number.

It is an amenable number.

1223121293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223121293 is an equidigital number, since it uses as much as digits as its factorization.

1223121293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 1223121293 is about 34973.1510304691. The cubic root of 1223121293 is about 1069.4402094134.

The spelling of 1223121293 in words is "one billion, two hundred twenty-three million, one hundred twenty-one thousand, two hundred ninety-three".