12010221312 has 72 divisors (see below), whose sum is σ = 32828692176. Its totient is φ = 3895197696.

The previous prime is 12010221277. The next prime is 12010221317. The reversal of 12010221312 is 21312201021.

It is a junction number, because it is equal to n+sod(n) for n = 12010221291 and 12010221300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010221317) 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, 182913 + ... + 239744.

It is an arithmetic number, because the mean of its divisors is an integer number (455954058).

Almost surely, 2^12010221312 is an apocalyptic number.

12010221312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12010221312 is an abundant number, since it is smaller than the sum of its proper divisors (20818470864).

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

12010221312 is an equidigital number, since it uses as much as digits as its factorization.

12010221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422713 (or 422699 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12010221312 its reverse (21312201021), we get a palindrome (33322422333).

The spelling of 12010221312 in words is "twelve billion, ten million, two hundred twenty-one thousand, three hundred twelve".