121312000012 has 24 divisors (see below), whose sum is σ = 243274487456. Its totient is φ = 51851467008.

The previous prime is 121311999997. The next prime is 121312000031. The reversal of 121312000012 is 210000213121.

It is a super-2 number, since 2×121312000012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121311999956 and 121312000001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5797293 + ... + 5818180.

Almost surely, 2^121312000012 is an apocalyptic number.

It is an amenable number.

121312000012 is an abundant number, since it is smaller than the sum of its proper divisors (121962487444).

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

121312000012 is a wasteful number, since it uses less digits than its factorization.

121312000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11615857 (or 11615855 counting only the distinct ones).

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

Adding to 121312000012 its reverse (210000213121), we get a palindrome (331312213133).

The spelling of 121312000012 in words is "one hundred twenty-one billion, three hundred twelve million, twelve", and thus it is an aban number.