188331121 has 8 divisors (see below), whose sum is σ = 208346688. Its totient is φ = 168798000.

The previous prime is 188331119. The next prime is 188331131. The reversal of 188331121 is 121133881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 188331121 - 2¹ = 188331119 is a prime.

It is a super-2 number, since 2×188331121² = 70937222274233282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 188331121.

It is not an unprimeable number, because it can be changed into a prime (188331131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119790 + ... + 121351.

It is an arithmetic number, because the mean of its divisors is an integer number (26043336).

Almost surely, 2^188331121 is an apocalyptic number.

188331121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

188331121 is a deficient number, since it is larger than the sum of its proper divisors (20015567).

188331121 is a wasteful number, since it uses less digits than its factorization.

188331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241223.

The product of its digits is 1152, while the sum is 28.

The square root of 188331121 is about 13723.3786291860. The cubic root of 188331121 is about 573.2015601778.

The spelling of 188331121 in words is "one hundred eighty-eight million, three hundred thirty-one thousand, one hundred twenty-one".