229119121 has 16 divisors (see below), whose sum is σ = 287723520. Its totient is φ = 177241680.

The previous prime is 229119103. The next prime is 229119127. The reversal of 229119121 is 121911922.

229119121 is a nontrivial binomial coefficient, being equal to C(21407, 2).

It is not a de Polignac number, because 229119121 - 2⁵ = 229119089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 229119121.

It is not an unprimeable number, because it can be changed into a prime (229119127) 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, 1 + ... + 21406.

It is an arithmetic number, because the mean of its divisors is an integer number (17982720).

Almost surely, 2^229119121 is an apocalyptic number.

229119121 is the 21406-th triangular number.

229119121 is the 7136-th centered nonagonal number.

It is an amenable number.

229119121 is a deficient number, since it is larger than the sum of its proper divisors (58604399).

229119121 is a wasteful number, since it uses less digits than its factorization.

229119121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21564.

The product of its digits is 648, while the sum is 28.

The square root of 229119121 is about 15136.6813073408. The cubic root of 229119121 is about 611.9093812956.

It can be divided in two parts, 2291 and 19121, that added together give a palindrome (21412).

The spelling of 229119121 in words is "two hundred twenty-nine million, one hundred nineteen thousand, one hundred twenty-one".