118223154021 has 12 divisors (see below), whose sum is σ = 183366524832. Its totient is φ = 67556087928.

The previous prime is 118223154019. The next prime is 118223154041. The reversal of 118223154021 is 120451322811.

It is a happy number.

It is not a de Polignac number, because 118223154021 - 2¹ = 118223154019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118223154021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118223154011) 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 11 ways as a sum of consecutive naturals, for example, 402119425 + ... + 402119718.

It is an arithmetic number, because the mean of its divisors is an integer number (15280543736).

Almost surely, 2^118223154021 is an apocalyptic number.

It is an amenable number.

118223154021 is a deficient number, since it is larger than the sum of its proper divisors (65143370811).

118223154021 is an equidigital number, since it uses as much as digits as its factorization.

118223154021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804239160 (or 804239153 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

Adding to 118223154021 its reverse (120451322811), we get a palindrome (238674476832).

The spelling of 118223154021 in words is "one hundred eighteen billion, two hundred twenty-three million, one hundred fifty-four thousand, twenty-one".