2123345020523 has 4 divisors (see below), whose sum is σ = 2138620884120. Its totient is φ = 2108069156928.

The previous prime is 2123345020507. The next prime is 2123345020567. The reversal of 2123345020523 is 3250205433212.

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 2123345020523 - 2⁴ = 2123345020507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123345020523.

It is not an unprimeable number, because it can be changed into a prime (2123345022523) 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 3 ways as a sum of consecutive naturals, for example, 7637931590 + ... + 7637931867.

It is an arithmetic number, because the mean of its divisors is an integer number (534655221030).

Almost surely, 2^{2123345020523} is an apocalyptic number.

2123345020523 is a deficient number, since it is larger than the sum of its proper divisors (15275863597).

2123345020523 is a wasteful number, since it uses less digits than its factorization.

2123345020523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15275863596.

The product of its (nonzero) digits is 43200, while the sum is 32.

The spelling of 2123345020523 in words is "two trillion, one hundred twenty-three billion, three hundred forty-five million, twenty thousand, five hundred twenty-three".