2123111957567 has 2 divisors, whose sum is σ = 2123111957568. Its totient is φ = 2123111957566.

The previous prime is 2123111957539. The next prime is 2123111957597. The reversal of 2123111957567 is 7657591113212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123111957567 - 2⁶ = 2123111957503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123111957597) 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 as a sum of consecutive naturals, namely, 1061555978783 + 1061555978784.

It is an arithmetic number, because the mean of its divisors is an integer number (1061555978784).

Almost surely, 2^{2123111957567} is an apocalyptic number.

2123111957567 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123111957567 is an equidigital number, since it uses as much as digits as its factorization.

2123111957567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 50.

The spelling of 2123111957567 in words is "two trillion, one hundred twenty-three billion, one hundred eleven million, nine hundred fifty-seven thousand, five hundred sixty-seven".