121145042 has 4 divisors (see below), whose sum is σ = 181717566. Its totient is φ = 60572520.

The previous prime is 121145041. The next prime is 121145053. The reversal of 121145042 is 240541121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 79941481 + 41203561 = 8941^2 + 6419^2 .

It is a super-3 number, since 3×121145042³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30286259 + ... + 30286262.

Almost surely, 2^121145042 is an apocalyptic number.

121145042 is a deficient number, since it is larger than the sum of its proper divisors (60572524).

121145042 is an equidigital number, since it uses as much as digits as its factorization.

121145042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60572523.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 121145042 is about 11006.5908436718. The cubic root of 121145042 is about 494.8062936256.

Adding to 121145042 its reverse (240541121), we get a palindrome (361686163).

The spelling of 121145042 in words is "one hundred twenty-one million, one hundred forty-five thousand, forty-two".