1020188277197 has 2 divisors, whose sum is σ = 1020188277198. Its totient is φ = 1020188277196.

The previous prime is 1020188277191. The next prime is 1020188277289. The reversal of 1020188277197 is 7917728810201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 914033514601 + 106154762596 = 956051^2 + 325814^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020188277197 - 2³² = 1015893309901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020188277191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510094138598 + 510094138599.

It is an arithmetic number, because the mean of its divisors is an integer number (510094138599).

Almost surely, 2^{1020188277197} is an apocalyptic number.

It is an amenable number.

1020188277197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020188277197 is an equidigital number, since it uses as much as digits as its factorization.

1020188277197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 53.

The spelling of 1020188277197 in words is "one trillion, twenty billion, one hundred eighty-eight million, two hundred seventy-seven thousand, one hundred ninety-seven".