1211110197 has 16 divisors (see below), whose sum is σ = 1774295040. Its totient is φ = 728722800.

The previous prime is 1211110189. The next prime is 1211110207. The reversal of 1211110197 is 7910111121.

It is not a de Polignac number, because 1211110197 - 2³ = 1211110189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211110297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127429 + ... + 136602.

It is an arithmetic number, because the mean of its divisors is an integer number (110893440).

Almost surely, 2^1211110197 is an apocalyptic number.

It is an amenable number.

1211110197 is a deficient number, since it is larger than the sum of its proper divisors (563184843).

1211110197 is a wasteful number, since it uses less digits than its factorization.

1211110197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264184.

The product of its (nonzero) digits is 126, while the sum is 24.

The square root of 1211110197 is about 34801.0085629713. The cubic root of 1211110197 is about 1065.9280402856.

The spelling of 1211110197 in words is "one billion, two hundred eleven million, one hundred ten thousand, one hundred ninety-seven".