1213023243123 has 24 divisors (see below), whose sum is σ = 1874337938928. Its totient is φ = 753266092032.

The previous prime is 1213023243121. The next prime is 1213023243137. The reversal of 1213023243123 is 3213423203121.

1213023243123 is a `hidden beast` number, since 1 + 2 + 1 + 302 + 324 + 31 + 2 + 3 = 666.

It is not a de Polignac number, because 1213023243123 - 2¹ = 1213023243121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213023243121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40852461 + ... + 40882142.

It is an arithmetic number, because the mean of its divisors is an integer number (78097414122).

Almost surely, 2^{1213023243123} is an apocalyptic number.

1213023243123 is a deficient number, since it is larger than the sum of its proper divisors (661314695805).

1213023243123 is a wasteful number, since it uses less digits than its factorization.

1213023243123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81734723 (or 81734720 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 1213023243123 its reverse (3213423203121), we get a palindrome (4426446446244).

The spelling of 1213023243123 in words is "one trillion, two hundred thirteen billion, twenty-three million, two hundred forty-three thousand, one hundred twenty-three".