121122545 has 4 divisors (see below), whose sum is σ = 145347060. Its totient is φ = 96898032.

The previous prime is 121122527. The next prime is 121122559. The reversal of 121122545 is 545221121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545221121 = 557 ⋅978853.

It can be written as a sum of positive squares in 2 ways, for example, as 65157184 + 55965361 = 8072^2 + 7481^2 .

It is a cyclic number.

It is not a de Polignac number, because 121122545 - 2¹² = 121118449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121122545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12112250 + ... + 12112259.

It is an arithmetic number, because the mean of its divisors is an integer number (36336765).

Almost surely, 2^121122545 is an apocalyptic number.

It is an amenable number.

121122545 is a deficient number, since it is larger than the sum of its proper divisors (24224515).

121122545 is an equidigital number, since it uses as much as digits as its factorization.

121122545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24224514.

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

The square root of 121122545 is about 11005.5688176486. The cubic root of 121122545 is about 494.7756627220.

Adding to 121122545 its reverse (545221121), we get a palindrome (666343666).

The spelling of 121122545 in words is "one hundred twenty-one million, one hundred twenty-two thousand, five hundred forty-five".