1201223197 has 2 divisors, whose sum is σ = 1201223198. Its totient is φ = 1201223196.

The previous prime is 1201223159. The next prime is 1201223209. The reversal of 1201223197 is 7913221021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 610781796 + 590441401 = 24714^2 + 24299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201223197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201223137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600611598 + 600611599.

It is an arithmetic number, because the mean of its divisors is an integer number (600611599).

Almost surely, 2^1201223197 is an apocalyptic number.

It is an amenable number.

1201223197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201223197 is an equidigital number, since it uses as much as digits as its factorization.

1201223197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1201223197 is about 34658.6669824447. Note that the first 3 decimals coincide. The cubic root of 1201223197 is about 1063.0195134515.

The spelling of 1201223197 in words is "one billion, two hundred one million, two hundred twenty-three thousand, one hundred ninety-seven".