2123111957767 has 2 divisors, whose sum is σ = 2123111957768. Its totient is φ = 2123111957766.

The previous prime is 2123111957711. The next prime is 2123111957801. The reversal of 2123111957767 is 7677591113212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123111957767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123111957567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061555978883 + 1061555978884.

It is an arithmetic number, because the mean of its divisors is an integer number (1061555978884).

Almost surely, 2^{2123111957767} is an apocalyptic number.

2123111957767 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123111957767 is an equidigital number, since it uses as much as digits as its factorization.

2123111957767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1111320, while the sum is 52.

The spelling of 2123111957767 in words is "two trillion, one hundred twenty-three billion, one hundred eleven million, nine hundred fifty-seven thousand, seven hundred sixty-seven".