1188861220197 has 24 divisors (see below), whose sum is σ = 1986209918784. Its totient is φ = 671164334784.

The previous prime is 1188861220193. The next prime is 1188861220223. The reversal of 1188861220197 is 7910221688811.

1188861220197 is a `hidden beast` number, since 1 + 1 + 8 + 8 + 8 + 612 + 2 + 0 + 19 + 7 = 666.

It is not a de Polignac number, because 1188861220197 - 2² = 1188861220193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188861220193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113674368 + ... + 113684825.

It is an arithmetic number, because the mean of its divisors is an integer number (82758746616).

Almost surely, 2^{1188861220197} is an apocalyptic number.

It is an amenable number.

1188861220197 is a deficient number, since it is larger than the sum of its proper divisors (797348698587).

1188861220197 is a wasteful number, since it uses less digits than its factorization.

1188861220197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227359289 (or 227359286 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 54.

The spelling of 1188861220197 in words is "one trillion, one hundred eighty-eight billion, eight hundred sixty-one million, two hundred twenty thousand, one hundred ninety-seven".