121145045 has 32 divisors (see below), whose sum is σ = 177561600. Its totient is φ = 77495616.

The previous prime is 121145041. The next prime is 121145053. The reversal of 121145045 is 540541121.

It is a cyclic number.

It is not a de Polignac number, because 121145045 - 2² = 121145041 is a prime.

It is a super-4 number, since 4×121145045⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121145045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121145041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43196 + ... + 45914.

It is an arithmetic number, because the mean of its divisors is an integer number (5548800).

Almost surely, 2^121145045 is an apocalyptic number.

It is an amenable number.

121145045 is a deficient number, since it is larger than the sum of its proper divisors (56416555).

121145045 is a wasteful number, since it uses less digits than its factorization.

121145045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817.

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

The square root of 121145045 is about 11006.5909799538. The cubic root of 121145045 is about 494.8062977100.

Adding to 121145045 its reverse (540541121), we get a palindrome (661686166).

The spelling of 121145045 in words is "one hundred twenty-one million, one hundred forty-five thousand, forty-five".