1220012197 has 2 divisors, whose sum is σ = 1220012198. Its totient is φ = 1220012196.

The previous prime is 1220012177. The next prime is 1220012203. The reversal of 1220012197 is 7912100221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714706756 + 505305441 = 26734^2 + 22479^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220012197 - 2¹¹ = 1220010149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220012147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610006098 + 610006099.

It is an arithmetic number, because the mean of its divisors is an integer number (610006099).

Almost surely, 2^1220012197 is an apocalyptic number.

It is an amenable number.

1220012197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220012197 is an equidigital number, since it uses as much as digits as its factorization.

1220012197 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 25.

The square root of 1220012197 is about 34928.6729922567. The cubic root of 1220012197 is about 1068.5332910269.

The spelling of 1220012197 in words is "one billion, two hundred twenty million, twelve thousand, one hundred ninety-seven".