1161212206 has 32 divisors (see below), whose sum is σ = 2179768320. Its totient is φ = 450722400.

The previous prime is 1161212179. The next prime is 1161212233. The reversal of 1161212206 is 6022121611.

It is an interprime number because it is at equal distance from previous prime (1161212179) and next prime (1161212233).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27411 + ... + 55441.

It is an arithmetic number, because the mean of its divisors is an integer number (68117760).

Almost surely, 2^1161212206 is an apocalyptic number.

1161212206 is a deficient number, since it is larger than the sum of its proper divisors (1018556114).

1161212206 is a wasteful number, since it uses less digits than its factorization.

1161212206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28320.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1161212206 is about 34076.5638819409. The cubic root of 1161212206 is about 1051.0834488480.

Adding to 1161212206 its reverse (6022121611), we get a palindrome (7183333817).

The spelling of 1161212206 in words is "one billion, one hundred sixty-one million, two hundred twelve thousand, two hundred six".