1213123023043 has 2 divisors, whose sum is σ = 1213123023044. Its totient is φ = 1213123023042.

The previous prime is 1213123023041. The next prime is 1213123023139. The reversal of 1213123023043 is 3403203213121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213123023043 - 2¹ = 1213123023041 is a prime.

Together with 1213123023041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1213123022999 and 1213123023017.

It is not a weakly prime, because it can be changed into another prime (1213123023041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606561511521 + 606561511522.

It is an arithmetic number, because the mean of its divisors is an integer number (606561511522).

Almost surely, 2^{1213123023043} is an apocalyptic number.

1213123023043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213123023043 is an equidigital number, since it uses as much as digits as its factorization.

1213123023043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1213123023043 its reverse (3403203213121), we get a palindrome (4616326236164).

The spelling of 1213123023043 in words is "one trillion, two hundred thirteen billion, one hundred twenty-three million, twenty-three thousand, forty-three".