1211220112097 has 2 divisors, whose sum is σ = 1211220112098. Its totient is φ = 1211220112096.

The previous prime is 1211220112043. The next prime is 1211220112121. The reversal of 1211220112097 is 7902110221121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1054644787681 + 156575324416 = 1026959^2 + 395696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211220112097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211220312097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605610056048 + 605610056049.

It is an arithmetic number, because the mean of its divisors is an integer number (605610056049).

Almost surely, 2^{1211220112097} is an apocalyptic number.

It is an amenable number.

1211220112097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211220112097 is an equidigital number, since it uses as much as digits as its factorization.

1211220112097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 29.

The spelling of 1211220112097 in words is "one trillion, two hundred eleven billion, two hundred twenty million, one hundred twelve thousand, ninety-seven".