121100004 has 36 divisors (see below), whose sum is σ = 306948096. Its totient is φ = 40256688.

The previous prime is 121100003. The next prime is 121100011. The reversal of 121100004 is 400001121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (121100003) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9397 + ... + 18179.

It is an arithmetic number, because the mean of its divisors is an integer number (8526336).

Almost surely, 2^121100004 is an apocalyptic number.

It is an amenable number.

121100004 is an abundant number, since it is smaller than the sum of its proper divisors (185848092).

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

121100004 is a wasteful number, since it uses less digits than its factorization.

121100004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9176 (or 9171 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 121100004 is about 11004.5446975329. The cubic root of 121100004 is about 494.7449681057.

Adding to 121100004 its reverse (400001121), we get a palindrome (521101125).

The spelling of 121100004 in words is "one hundred twenty-one million, one hundred thousand, four".