121099971143 has 2 divisors, whose sum is σ = 121099971144. Its totient is φ = 121099971142.

The previous prime is 121099971131. The next prime is 121099971149. The reversal of 121099971143 is 341179990121.

It is a strong prime.

It is an emirp because it is prime and its reverse (341179990121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121099971143 - 2²² = 121095776839 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121099971149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60549985571 + 60549985572.

It is an arithmetic number, because the mean of its divisors is an integer number (60549985572).

Almost surely, 2^121099971143 is an apocalyptic number.

121099971143 is a deficient number, since it is larger than the sum of its proper divisors (1).

121099971143 is an equidigital number, since it uses as much as digits as its factorization.

121099971143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 47.

The spelling of 121099971143 in words is "one hundred twenty-one billion, ninety-nine million, nine hundred seventy-one thousand, one hundred forty-three".