121432100 has 36 divisors (see below), whose sum is σ = 264240900. Its totient is φ = 48437760.

The previous prime is 121432057. The next prime is 121432117. The reversal of 121432100 is 1234121.

It can be written as a sum of positive squares in 6 ways, for example, as 7540516 + 113891584 = 2746^2 + 10672^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39416 + ... + 42384.

It is an arithmetic number, because the mean of its divisors is an integer number (7340025).

Almost surely, 2^121432100 is an apocalyptic number.

121432100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121432100 is an abundant number, since it is smaller than the sum of its proper divisors (142808800).

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

121432100 is a wasteful number, since it uses less digits than its factorization.

121432100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3392 (or 3385 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121432100 is about 11019.6234055434. The cubic root of 121432100 is about 495.1968064133.

Adding to 121432100 its reverse (1234121), we get a palindrome (122666221).

The spelling of 121432100 in words is "one hundred twenty-one million, four hundred thirty-two thousand, one hundred".