121138 has 8 divisors (see below), whose sum is σ = 186732. Its totient is φ = 58896.

The previous prime is 121123. The next prime is 121139. The reversal of 121138 is 831121.

It can be written as a sum of positive squares in 2 ways, for example, as 120409 + 729 = 347^2 + 27^2 .

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

It is not an unprimeable number, because it can be changed into a prime (121139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745 + ... + 892.

2¹²¹¹³⁸ is an apocalyptic number.

121138 is a deficient number, since it is larger than the sum of its proper divisors (65594).

121138 is a wasteful number, since it uses less digits than its factorization.

121138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676.

The product of its digits is 48, while the sum is 16.

The square root of 121138 is about 348.0488471465. The cubic root of 121138 is about 49.4796705963.

Adding to 121138 its reverse (831121), we get a palindrome (952259).

It can be divided in two parts, 12113 and 8, that added together give a palindrome (12121).

The spelling of 121138 in words is "one hundred twenty-one thousand, one hundred thirty-eight".