1220300240045 has 4 divisors (see below), whose sum is σ = 1464360288060. Its totient is φ = 976240192032.

The previous prime is 1220300240041. The next prime is 1220300240059. The reversal of 1220300240045 is 5400420030221.

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 2 ways, for example, as 418333423369 + 801966816676 = 646787^2 + 895526^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220300240045 - 2² = 1220300240041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220300240045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220300240041) 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, 122030024000 + ... + 122030024009.

It is an arithmetic number, because the mean of its divisors is an integer number (366090072015).

Almost surely, 2^{1220300240045} is an apocalyptic number.

It is an amenable number.

1220300240045 is a deficient number, since it is larger than the sum of its proper divisors (244060048015).

1220300240045 is an equidigital number, since it uses as much as digits as its factorization.

1220300240045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244060048014.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 1220300240045 its reverse (5400420030221), we get a palindrome (6620720270266).

The spelling of 1220300240045 in words is "one trillion, two hundred twenty billion, three hundred million, two hundred forty thousand, forty-five".