206941891122 has 90 divisors (see below), whose sum is σ = 469602115983. Its totient is φ = 68114054088.

The previous prime is 206941891109. The next prime is 206941891129. The reversal of 206941891122 is 221198149602.

It is a happy number.

206941891122 is a `hidden beast` number, since 20 + 6 + 9 + 418 + 91 + 122 = 666.

It can be written as a sum of positive squares in only one way, i.e., 103470945561 + 103470945561 = 321669^2 + 321669^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=321669.

It is a super-2 number, since 2×206941891122² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206941891129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 596374153 + ... + 596374499.

Almost surely, 2^206941891122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206941891122

206941891122 is an abundant number, since it is smaller than the sum of its proper divisors (262660224861).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206941891122 is an frugal number, since it uses more digits than its factorization.

206941891122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 206941891122 in words is "two hundred six billion, nine hundred forty-one million, eight hundred ninety-one thousand, one hundred twenty-two".