10000121312 has 24 divisors (see below), whose sum is σ = 19729926216. Its totient is φ = 4989346432.

The previous prime is 10000121311. The next prime is 10000121347. The reversal of 10000121312 is 21312100001.

It is a junction number, because it is equal to n+sod(n) for n = 10000121293 and 10000121302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000121311) 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, 319643 + ... + 349530.

It is an arithmetic number, because the mean of its divisors is an integer number (822080259).

Almost surely, 2^10000121312 is an apocalyptic number.

It is an amenable number.

10000121312 is a deficient number, since it is larger than the sum of its proper divisors (9729804904).

10000121312 is an equidigital number, since it uses as much as digits as its factorization.

10000121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669650 (or 669642 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 10000121312 its reverse (21312100001), we get a palindrome (31312221313).

It can be divided in two parts, 100001 and 21312, that multiplied together give a palindrome (2131221312).

The spelling of 10000121312 in words is "ten billion, one hundred twenty-one thousand, three hundred twelve".