1012111212197 has 2 divisors, whose sum is σ = 1012111212198. Its totient is φ = 1012111212196.

The previous prime is 1012111212181. The next prime is 1012111212221. The reversal of 1012111212197 is 7912121112101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 989177441476 + 22933770721 = 994574^2 + 151439^2 .

It is an emirp because it is prime and its reverse (7912121112101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1012111212197 - 2⁴ = 1012111212181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012111217197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506055606098 + 506055606099.

It is an arithmetic number, because the mean of its divisors is an integer number (506055606099).

Almost surely, 2^{1012111212197} is an apocalyptic number.

It is an amenable number.

1012111212197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012111212197 is an equidigital number, since it uses as much as digits as its factorization.

1012111212197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 29.

Adding to 1012111212197 its reverse (7912121112101), we get a palindrome (8924232324298).

The spelling of 1012111212197 in words is "one trillion, twelve billion, one hundred eleven million, two hundred twelve thousand, one hundred ninety-seven".