101823721218 has 40 divisors (see below), whose sum is σ = 240169018320. Its totient is φ = 32154858360.

The previous prime is 101823721201. The next prime is 101823721247. The reversal of 101823721218 is 812127328101.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 16537488 + ... + 16543643.

It is an arithmetic number, because the mean of its divisors is an integer number (6004225458).

Almost surely, 2^101823721218 is an apocalyptic number.

101823721218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

101823721218 is an abundant number, since it is smaller than the sum of its proper divisors (138345297102).

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

101823721218 is a wasteful number, since it uses less digits than its factorization.

101823721218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33081164 (or 33081155 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 101823721218 in words is "one hundred one billion, eight hundred twenty-three million, seven hundred twenty-one thousand, two hundred eighteen".