121200045 has 16 divisors (see below), whose sum is σ = 195921600. Its totient is φ = 63972864.

The previous prime is 121200017. The next prime is 121200047. The reversal of 121200045 is 540002121.

It is not a de Polignac number, because 121200045 - 2¹¹ = 121197997 is a prime.

It is a super-3 number, since 3×121200045³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 121199997 and 121200033.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40195 + ... + 43104.

It is an arithmetic number, because the mean of its divisors is an integer number (12245100).

Almost surely, 2^121200045 is an apocalyptic number.

121200045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121200045 is a deficient number, since it is larger than the sum of its proper divisors (74721555).

121200045 is an equidigital number, since it uses as much as digits as its factorization.

121200045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83404.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 121200045 is about 11009.0891993843. The cubic root of 121200045 is about 494.8811672709.

Adding to 121200045 its reverse (540002121), we get a palindrome (661202166).

The spelling of 121200045 in words is "one hundred twenty-one million, two hundred thousand, forty-five".