1125992099861 has 2 divisors, whose sum is σ = 1125992099862. Its totient is φ = 1125992099860.

The previous prime is 1125992099797. The next prime is 1125992099923. The reversal of 1125992099861 is 1689902995211.

It is an a-pointer prime, because the next prime (1125992099923) can be obtained adding 1125992099861 to its sum of digits (62).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 986625024100 + 139367075761 = 993290^2 + 373319^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125992099861 - 2⁶ = 1125992099797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1125992099794 and 1125992099803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125992096861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562996049930 + 562996049931.

It is an arithmetic number, because the mean of its divisors is an integer number (562996049931).

Almost surely, 2^{1125992099861} is an apocalyptic number.

It is an amenable number.

1125992099861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125992099861 is an equidigital number, since it uses as much as digits as its factorization.

1125992099861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6298560, while the sum is 62.

The spelling of 1125992099861 in words is "one trillion, one hundred twenty-five billion, nine hundred ninety-two million, ninety-nine thousand, eight hundred sixty-one".