100121311218 has 16 divisors (see below), whose sum is σ = 200246687136. Its totient is φ = 33373092960.

The previous prime is 100121311207. The next prime is 100121311253. The reversal of 100121311218 is 812113121001.

It is a super-2 number, since 2×100121311218² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100121311194 and 100121311203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219553 + ... + 498443.

It is an arithmetic number, because the mean of its divisors is an integer number (12515417946).

Almost surely, 2^100121311218 is an apocalyptic number.

100121311218 is an abundant number, since it is smaller than the sum of its proper divisors (100125375918).

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

100121311218 is a wasteful number, since it uses less digits than its factorization.

100121311218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338729.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 100121311218 its reverse (812113121001), we get a palindrome (912234432219).

The spelling of 100121311218 in words is "one hundred billion, one hundred twenty-one million, three hundred eleven thousand, two hundred eighteen".