121312012 has 6 divisors (see below), whose sum is σ = 212296028. Its totient is φ = 60656004.

The previous prime is 121312007. The next prime is 121312013. The reversal of 121312012 is 210213121.

It is a junction number, because it is equal to n+sod(n) for n = 121311983 and 121312001.

It is not an unprimeable number, because it can be changed into a prime (121312013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15163998 + ... + 15164005.

Almost surely, 2^121312012 is an apocalyptic number.

It is an amenable number.

121312012 is a deficient number, since it is larger than the sum of its proper divisors (90984016).

121312012 is a wasteful number, since it uses less digits than its factorization.

121312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30328007 (or 30328005 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121312012 is about 11014.1732327034. The cubic root of 121312012 is about 495.0335140387.

Adding to 121312012 its reverse (210213121), we get a palindrome (331525133).

It can be divided in two parts, 1213 and 12012, that added together give a square (13225 = 115²).

The spelling of 121312012 in words is "one hundred twenty-one million, three hundred twelve thousand, twelve".