12121004 has 12 divisors (see below), whose sum is σ = 24242064. Its totient is φ = 5194704.

The previous prime is 12120989. The next prime is 12121009. The reversal of 12121004 is 40012121.

12121004 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12121009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216419 + ... + 216474.

It is an arithmetic number, because the mean of its divisors is an integer number (2020172).

Almost surely, 2^12121004 is an apocalyptic number.

12121004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12121004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12121004 is a wasteful number, since it uses less digits than its factorization.

12121004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432904 (or 432902 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 12121004 is about 3481.5232298521. The cubic root of 12121004 is about 229.7098041401.

Adding to 12121004 its reverse (40012121), we get a palindrome (52133125).

The spelling of 12121004 in words is "twelve million, one hundred twenty-one thousand, four".