1211203123043 has 2 divisors, whose sum is σ = 1211203123044. Its totient is φ = 1211203123042.

The previous prime is 1211203123021. The next prime is 1211203123093. The reversal of 1211203123043 is 3403213021121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211203123043 - 2²² = 1211198928739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211203123093) 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, 605601561521 + 605601561522.

It is an arithmetic number, because the mean of its divisors is an integer number (605601561522).

Almost surely, 2^{1211203123043} is an apocalyptic number.

1211203123043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211203123043 is an equidigital number, since it uses as much as digits as its factorization.

1211203123043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1211203123043 its reverse (3403213021121), we get a palindrome (4614416144164).

The spelling of 1211203123043 in words is "one trillion, two hundred eleven billion, two hundred three million, one hundred twenty-three thousand, forty-three".