121000004 has 6 divisors (see below), whose sum is σ = 211750014. Its totient is φ = 60500000.

The previous prime is 121000003. The next prime is 121000049. The reversal of 121000004 is 400000121.

It can be written as a sum of positive squares in only one way, i.e., 121000000 + 4 = 11000^2 + 2^2 .

It is a junction number, because it is equal to n+sod(n) for n = 120999955 and 121000000.

It is not an unprimeable number, because it can be changed into a prime (121000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15124997 + ... + 15125004.

It is an arithmetic number, because the mean of its divisors is an integer number (35291669).

Almost surely, 2^121000004 is an apocalyptic number.

It is an amenable number.

121000004 is a deficient number, since it is larger than the sum of its proper divisors (90750010).

121000004 is a wasteful number, since it uses less digits than its factorization.

121000004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30250005 (or 30250003 counting only the distinct ones).

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

The square root of 121000004 is about 11000.0001818182. Note that the first 3 decimals coincide. The cubic root of 121000004 is about 494.6087497751.

Adding to 121000004 its reverse (400000121), we get a palindrome (521000125).

The spelling of 121000004 in words is "one hundred twenty-one million, four", and thus it is an aban number.