305121042042 has 32 divisors (see below), whose sum is σ = 616300339200. Its totient is φ = 100697733360.

The previous prime is 305121041993. The next prime is 305121042043. The reversal of 305121042042 is 240240121503.

It is not an unprimeable number, because it can be changed into a prime (305121042043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2934459 + ... + 3036657.

It is an arithmetic number, because the mean of its divisors is an integer number (19259385600).

Almost surely, 2^305121042042 is an apocalyptic number.

305121042042 is an abundant number, since it is smaller than the sum of its proper divisors (311179297158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

305121042042 is a wasteful number, since it uses less digits than its factorization.

305121042042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107138.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 305121042042 its reverse (240240121503), we get a palindrome (545361163545).

The spelling of 305121042042 in words is "three hundred five billion, one hundred twenty-one million, forty-two thousand, forty-two".