121105100 has 18 divisors (see below), whose sum is σ = 262798284. Its totient is φ = 48442000.

The previous prime is 121105087. The next prime is 121105121. The reversal of 121105100 is 1501121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605426 + ... + 605625.

Almost surely, 2^121105100 is an apocalyptic number.

121105100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121105100 is an abundant number, since it is smaller than the sum of its proper divisors (141693184).

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

121105100 is a wasteful number, since it uses less digits than its factorization.

121105100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211065 (or 1211058 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 121105100 is about 11004.7762357987. The cubic root of 121105100 is about 494.7519077834.

Adding to 121105100 its reverse (1501121), we get a palindrome (122606221).

The spelling of 121105100 in words is "one hundred twenty-one million, one hundred five thousand, one hundred".