1211110011197 has 2 divisors, whose sum is σ = 1211110011198. Its totient is φ = 1211110011196.

The previous prime is 1211110011149. The next prime is 1211110011229. The reversal of 1211110011197 is 7911100111121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1115165568196 + 95944443001 = 1056014^2 + 309749^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211110011197 - 2¹⁴ = 1211109994813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211110011107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605555005598 + 605555005599.

It is an arithmetic number, because the mean of its divisors is an integer number (605555005599).

Almost surely, 2^{1211110011197} is an apocalyptic number.

It is an amenable number.

1211110011197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211110011197 is an equidigital number, since it uses as much as digits as its factorization.

1211110011197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 26.

The spelling of 1211110011197 in words is "one trillion, two hundred eleven billion, one hundred ten million, eleven thousand, one hundred ninety-seven".