12011220197 has 2 divisors, whose sum is σ = 12011220198.
Its totient is φ = 12011220196.
The previous prime is 12011220187. The next prime is 12011220223. The reversal of 12011220197 is 79102211021.
It is an a-pointer prime, because the next prime (12011220223) can be obtained adding 12011220197 to its sum of digits (26).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 10715148196 + 1296072001 = 103514^2 + 36001^2
It is a cyclic number.
It is not a de Polignac number, because 12011220197 - 228 = 11742784741 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12011220107) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005610098 + 6005610099.
It is an arithmetic number, because the mean of its divisors is an integer number (6005610099).
Almost surely, 212011220197 is an apocalyptic number.
It is an amenable number.
12011220197 is a deficient number, since it is larger than the sum of its proper divisors (1).
12011220197 is an equidigital number, since it uses as much as digits as its factorization.
12011220197 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 26.
The spelling of 12011220197 in words is "twelve billion, eleven million, two hundred twenty thousand, one hundred ninety-seven".