2111121197 has 2 divisors, whose sum is σ = 2111121198. Its totient is φ = 2111121196.

The previous prime is 2111121161. The next prime is 2111121209. The reversal of 2111121197 is 7911211112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1843929481 + 267191716 = 42941^2 + 16346^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111121197 - 2¹⁰ = 2111120173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111126197) 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, 1055560598 + 1055560599.

It is an arithmetic number, because the mean of its divisors is an integer number (1055560599).

Almost surely, 2^2111121197 is an apocalyptic number.

It is an amenable number.

2111121197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111121197 is an equidigital number, since it uses as much as digits as its factorization.

2111121197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 26.

The square root of 2111121197 is about 45946.9389295957. The cubic root of 2111121197 is about 1282.8357533463.

The spelling of 2111121197 in words is "two billion, one hundred eleven million, one hundred twenty-one thousand, one hundred ninety-seven".