121312004 has 12 divisors (see below), whose sum is σ = 231595728. Its totient is φ = 55141800.

The previous prime is 121312003. The next prime is 121312007. The reversal of 121312004 is 400213121.

It is a self number, because there is not a number n which added to its sum of digits gives 121312004.

It is not an unprimeable number, because it can be changed into a prime (121312001) 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, 1378502 + ... + 1378589.

It is an arithmetic number, because the mean of its divisors is an integer number (19299644).

Almost surely, 2^121312004 is an apocalyptic number.

It is an amenable number.

121312004 is a deficient number, since it is larger than the sum of its proper divisors (110283724).

121312004 is a wasteful number, since it uses less digits than its factorization.

121312004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757106 (or 2757104 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121312004 is about 11014.1728695350. The cubic root of 121312004 is about 495.0335031570.

Adding to 121312004 its reverse (400213121), we get a palindrome (521525125).

The spelling of 121312004 in words is "one hundred twenty-one million, three hundred twelve thousand, four".