206113121 has 12 divisors (see below), whose sum is σ = 224718000. Its totient is φ = 188517168.

The previous prime is 206113093. The next prime is 206113123. The reversal of 206113121 is 121311602.

It is a de Polignac number, because none of the positive numbers 2^k-206113121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206113121.

It is not an unprimeable number, because it can be changed into a prime (206113123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9530 + ... + 22428.

It is an arithmetic number, because the mean of its divisors is an integer number (18726500).

Almost surely, 2^206113121 is an apocalyptic number.

It is an amenable number.

206113121 is a deficient number, since it is larger than the sum of its proper divisors (18604879).

206113121 is a wasteful number, since it uses less digits than its factorization.

206113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12976 (or 12947 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 206113121 is about 14356.6403103233. The cubic root of 206113121 is about 590.7021430960.

Adding to 206113121 its reverse (121311602), we get a palindrome (327424723).

It can be divided in two parts, 20611 and 3121, that added together give a palindrome (23732).

The spelling of 206113121 in words is "two hundred six million, one hundred thirteen thousand, one hundred twenty-one".