118721721020 has 48 divisors (see below), whose sum is σ = 285109977600. Its totient is φ = 40679183424.

The previous prime is 118721721017. The next prime is 118721721061. The reversal of 118721721020 is 20127127811.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38870 + ... + 488829.

It is an arithmetic number, because the mean of its divisors is an integer number (5939791200).

Almost surely, 2^118721721020 is an apocalyptic number.

118721721020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

118721721020 is an abundant number, since it is smaller than the sum of its proper divisors (166388256580).

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

118721721020 is a wasteful number, since it uses less digits than its factorization.

118721721020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529322 (or 529320 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 32.

Adding to 118721721020 its reverse (20127127811), we get a palindrome (138848848831).

The spelling of 118721721020 in words is "one hundred eighteen billion, seven hundred twenty-one million, seven hundred twenty-one thousand, twenty".