1231120307 has 2 divisors, whose sum is σ = 1231120308. Its totient is φ = 1231120306.

The previous prime is 1231120283. The next prime is 1231120313. The reversal of 1231120307 is 7030211321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231120307 - 2¹⁶ = 1231054771 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231120327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615560153 + 615560154.

It is an arithmetic number, because the mean of its divisors is an integer number (615560154).

Almost surely, 2^1231120307 is an apocalyptic number.

1231120307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231120307 is an equidigital number, since it uses as much as digits as its factorization.

1231120307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1231120307 is about 35087.3240216463. The cubic root of 1231120307 is about 1071.7664672266.

Adding to 1231120307 its reverse (7030211321), we get a palindrome (8261331628).

The spelling of 1231120307 in words is "one billion, two hundred thirty-one million, one hundred twenty thousand, three hundred seven".