1011213123023 has 4 divisors (see below), whose sum is σ = 1064434866360. Its totient is φ = 957991379688.

The previous prime is 1011213123007. The next prime is 1011213123031. The reversal of 1011213123023 is 3203213121101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1011213123023 - 2⁴ = 1011213123007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011213122986 and 1011213123004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011213143023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26610871640 + ... + 26610871677.

It is an arithmetic number, because the mean of its divisors is an integer number (266108716590).

Almost surely, 2^{1011213123023} is an apocalyptic number.

1011213123023 is a deficient number, since it is larger than the sum of its proper divisors (53221743337).

1011213123023 is an equidigital number, since it uses as much as digits as its factorization.

1011213123023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53221743336.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1011213123023 its reverse (3203213121101), we get a palindrome (4214426244124).

The spelling of 1011213123023 in words is "one trillion, eleven billion, two hundred thirteen million, one hundred twenty-three thousand, twenty-three".