1210001199943 has 2 divisors, whose sum is σ = 1210001199944. Its totient is φ = 1210001199942.

The previous prime is 1210001199923. The next prime is 1210001200039. The reversal of 1210001199943 is 3499911000121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1210001199943 - 2³⁷ = 1072562246471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210001199896 and 1210001199905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210001199923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605000599971 + 605000599972.

It is an arithmetic number, because the mean of its divisors is an integer number (605000599972).

Almost surely, 2^{1210001199943} is an apocalyptic number.

1210001199943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210001199943 is an equidigital number, since it uses as much as digits as its factorization.

1210001199943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 40.

The spelling of 1210001199943 in words is "one trillion, two hundred ten billion, one million, one hundred ninety-nine thousand, nine hundred forty-three".