100121111000 has 32 divisors (see below), whose sum is σ = 234283402080. Its totient is φ = 40048444000.

The previous prime is 100121110993. The next prime is 100121111011. The reversal of 100121111000 is 111121001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50059556 + ... + 50061555.

It is an arithmetic number, because the mean of its divisors is an integer number (7321356315).

Almost surely, 2^100121111000 is an apocalyptic number.

100121111000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121111000 is an abundant number, since it is smaller than the sum of its proper divisors (134162291080).

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

100121111000 is a wasteful number, since it uses less digits than its factorization.

100121111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100121132 (or 100121118 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 100121111000 its reverse (111121001), we get a palindrome (100232232001).

The spelling of 100121111000 in words is "one hundred billion, one hundred twenty-one million, one hundred eleven thousand".