121541045 has 4 divisors (see below), whose sum is σ = 145849260. Its totient is φ = 97232832.

The previous prime is 121541033. The next prime is 121541047. The reversal of 121541045 is 540145121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540145121 = 20399 ⋅26479.

It can be written as a sum of positive squares in 2 ways, for example, as 60357361 + 61183684 = 7769^2 + 7822^2 .

It is a cyclic number.

It is not a de Polignac number, because 121541045 - 2¹⁶ = 121475509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121541045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121541047) 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, 12154100 + ... + 12154109.

It is an arithmetic number, because the mean of its divisors is an integer number (36462315).

Almost surely, 2^121541045 is an apocalyptic number.

It is an amenable number.

121541045 is a deficient number, since it is larger than the sum of its proper divisors (24308215).

121541045 is an equidigital number, since it uses as much as digits as its factorization.

121541045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24308214.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 121541045 is about 11024.5655243189. The cubic root of 121541045 is about 495.3448537315.

Adding to 121541045 its reverse (540145121), we get a palindrome (661686166).

The spelling of 121541045 in words is "one hundred twenty-one million, five hundred forty-one thousand, forty-five".