138061121 has 24 divisors (see below), whose sum is σ = 156854880. Its totient is φ = 121373120.

The previous prime is 138061081. The next prime is 138061127. The reversal of 138061121 is 121160831.

It is not a de Polignac number, because 138061121 - 2¹⁸ = 137798977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138061127) 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 23 ways as a sum of consecutive naturals, for example, 592421 + ... + 592653.

It is an arithmetic number, because the mean of its divisors is an integer number (6535620).

Almost surely, 2^138061121 is an apocalyptic number.

138061121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

138061121 is a deficient number, since it is larger than the sum of its proper divisors (18793759).

138061121 is a wasteful number, since it uses less digits than its factorization.

138061121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 138061121 is about 11749.9413190024. The cubic root of 138061121 is about 516.8412067027.

The spelling of 138061121 in words is "one hundred thirty-eight million, sixty-one thousand, one hundred twenty-one".