10001212312 has 64 divisors (see below), whose sum is σ = 23824281600. Its totient is φ = 3828885120.

The previous prime is 10001212303. The next prime is 10001212379. The reversal of 10001212312 is 21321210001.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 10001212292 and 10001212301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199012 + ... + 244147.

It is an arithmetic number, because the mean of its divisors is an integer number (372254400).

Almost surely, 2^10001212312 is an apocalyptic number.

It is an amenable number.

10001212312 is an abundant number, since it is smaller than the sum of its proper divisors (13823069288).

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

10001212312 is a wasteful number, since it uses less digits than its factorization.

10001212312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443216 (or 443212 counting only the distinct ones).

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

Adding to 10001212312 its reverse (21321210001), we get a palindrome (31322422313).

The spelling of 10001212312 in words is "ten billion, one million, two hundred twelve thousand, three hundred twelve".