12121404 has 48 divisors (see below), whose sum is σ = 29465856. Its totient is φ = 3875200.

The previous prime is 12121393. The next prime is 12121423. The reversal of 12121404 is 40412121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34759 + ... + 35105.

It is an arithmetic number, because the mean of its divisors is an integer number (613872).

Almost surely, 2^12121404 is an apocalyptic number.

It is an amenable number.

12121404 is an abundant number, since it is smaller than the sum of its proper divisors (17344452).

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

12121404 is a wasteful number, since it uses less digits than its factorization.

12121404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 12121404 is about 3481.5806754978. The cubic root of 12121404 is about 229.7123309635.

Adding to 12121404 its reverse (40412121), we get a palindrome (52533525).

The spelling of 12121404 in words is "twelve million, one hundred twenty-one thousand, four hundred four".