121188541 has 16 divisors (see below), whose sum is σ = 129790080. Its totient is φ = 112907520.

The previous prime is 121188527. The next prime is 121188547. The reversal of 121188541 is 145881121.

It is a 6-Lehmer number, since φ(121188541) divides (121188541-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 121188541 - 2¹¹ = 121186493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121188547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149026 + ... + 149836.

It is an arithmetic number, because the mean of its divisors is an integer number (8111880).

Almost surely, 2^121188541 is an apocalyptic number.

It is an amenable number.

121188541 is a deficient number, since it is larger than the sum of its proper divisors (8601539).

121188541 is an equidigital number, since it uses as much as digits as its factorization.

121188541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996.

The product of its digits is 2560, while the sum is 31.

The square root of 121188541 is about 11008.5667096130. The cubic root of 121188541 is about 494.8655091549.

The spelling of 121188541 in words is "one hundred twenty-one million, one hundred eighty-eight thousand, five hundred forty-one".