100121450 has 144 divisors (see below), whose sum is σ = 235505760. Its totient is φ = 31363200.

The previous prime is 100121447. The next prime is 100121453. The reversal of 100121450 is 54121001.

It is an interprime number because it is at equal distance from previous prime (100121447) and next prime (100121453).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100121453) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 1494317 + ... + 1494383.

Almost surely, 2^100121450 is an apocalyptic number.

100121450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100121450 is an abundant number, since it is smaller than the sum of its proper divisors (135384310).

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

100121450 is a wasteful number, since it uses less digits than its factorization.

100121450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 100121450 is about 10006.0706573560. The cubic root of 100121450 is about 464.3467143295.

Adding to 100121450 its reverse (54121001), we get a palindrome (154242451).

The spelling of 100121450 in words is "one hundred million, one hundred twenty-one thousand, four hundred fifty".