121113145 has 4 divisors (see below), whose sum is σ = 145335780. Its totient is φ = 96890512.

The previous prime is 121113143. The next prime is 121113199. The reversal of 121113145 is 541311121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59474944 + 61638201 = 7712^2 + 7851^2 .

It is a cyclic number.

It is not a de Polignac number, because 121113145 - 2¹ = 121113143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121113143) 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, 12111310 + ... + 12111319.

It is an arithmetic number, because the mean of its divisors is an integer number (36333945).

Almost surely, 2^121113145 is an apocalyptic number.

It is an amenable number.

121113145 is a deficient number, since it is larger than the sum of its proper divisors (24222635).

121113145 is an equidigital number, since it uses as much as digits as its factorization.

121113145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24222634.

The product of its digits is 120, while the sum is 19.

The square root of 121113145 is about 11005.1417528354. The cubic root of 121113145 is about 494.7628629812.

Adding to 121113145 its reverse (541311121), we get a palindrome (662424266).

The spelling of 121113145 in words is "one hundred twenty-one million, one hundred thirteen thousand, one hundred forty-five".