1231120001233 has 2 divisors, whose sum is σ = 1231120001234. Its totient is φ = 1231120001232.

The previous prime is 1231120001231. The next prime is 1231120001327. The reversal of 1231120001233 is 3321000211321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1082407190544 + 148712810689 = 1040388^2 + 385633^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231120001233 - 2¹ = 1231120001231 is a prime.

Together with 1231120001231, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1231120001233.

It is not a weakly prime, because it can be changed into another prime (1231120001231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615560000616 + 615560000617.

It is an arithmetic number, because the mean of its divisors is an integer number (615560000617).

Almost surely, 2^{1231120001233} is an apocalyptic number.

It is an amenable number.

1231120001233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231120001233 is an equidigital number, since it uses as much as digits as its factorization.

1231120001233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1231120001233 its reverse (3321000211321), we get a palindrome (4552120212554).

The spelling of 1231120001233 in words is "one trillion, two hundred thirty-one billion, one hundred twenty million, one thousand, two hundred thirty-three".