121312132012 has 24 divisors (see below), whose sum is σ = 215603781120. Its totient is φ = 59712219600.

The previous prime is 121312131961. The next prime is 121312132013. The reversal of 121312132012 is 210231213121.

It is not an unprimeable number, because it can be changed into a prime (121312132013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272637 + ... + 562987.

It is an arithmetic number, because the mean of its divisors is an integer number (8983490880).

Almost surely, 2^121312132012 is an apocalyptic number.

It is an amenable number.

121312132012 is a deficient number, since it is larger than the sum of its proper divisors (94291649108).

121312132012 is a wasteful number, since it uses less digits than its factorization.

121312132012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291981 (or 291979 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121312132012 its reverse (210231213121), we get a palindrome (331543345133).

The spelling of 121312132012 in words is "one hundred twenty-one billion, three hundred twelve million, one hundred thirty-two thousand, twelve".