121428104 has 32 divisors (see below), whose sum is σ = 269179200. Its totient is φ = 50245440.

The previous prime is 121428103. The next prime is 121428113. The reversal of 121428104 is 401824121.

It is a self number, because there is not a number n which added to its sum of digits gives 121428104.

It is not an unprimeable number, because it can be changed into a prime (121428103) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 35762 + ... + 39009.

It is an arithmetic number, because the mean of its divisors is an integer number (8411850).

Almost surely, 2^121428104 is an apocalyptic number.

121428104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121428104 is an abundant number, since it is smaller than the sum of its proper divisors (147751096).

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

121428104 is a wasteful number, since it uses less digits than its factorization.

121428104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74813 (or 74809 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 121428104 is about 11019.4420911405. The cubic root of 121428104 is about 495.1913744938.

The spelling of 121428104 in words is "one hundred twenty-one million, four hundred twenty-eight thousand, one hundred four".