1231214213249 has 2 divisors, whose sum is σ = 1231214213250. Its totient is φ = 1231214213248.

The previous prime is 1231214213219. The next prime is 1231214213261. The reversal of 1231214213249 is 9423124121321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1143498729025 + 87715484224 = 1069345^2 + 296168^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231214213249 - 2²⁴ = 1231197436033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231214213219) 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, 615607106624 + 615607106625.

It is an arithmetic number, because the mean of its divisors is an integer number (615607106625).

Almost surely, 2^{1231214213249} is an apocalyptic number.

It is an amenable number.

1231214213249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231214213249 is an equidigital number, since it uses as much as digits as its factorization.

1231214213249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The spelling of 1231214213249 in words is "one trillion, two hundred thirty-one billion, two hundred fourteen million, two hundred thirteen thousand, two hundred forty-nine".