7920123113311 has 4 divisors (see below), whose sum is σ = 8113296847824. Its totient is φ = 7726949378800.

The previous prime is 7920123113281. The next prime is 7920123113333. The reversal of 7920123113311 is 1133113210297.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7920123113311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7920123113341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96586867195 + ... + 96586867276.

It is an arithmetic number, because the mean of its divisors is an integer number (2028324211956).

Almost surely, 2^{7920123113311} is an apocalyptic number.

7920123113311 is a deficient number, since it is larger than the sum of its proper divisors (193173734513).

7920123113311 is a wasteful number, since it uses less digits than its factorization.

7920123113311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193173734512.

The product of its (nonzero) digits is 6804, while the sum is 34.

The spelling of 7920123113311 in words is "seven trillion, nine hundred twenty billion, one hundred twenty-three million, one hundred thirteen thousand, three hundred eleven".