12100321212 has 24 divisors (see below), whose sum is σ = 32267523456. Its totient is φ = 3457234608.

The previous prime is 12100321193. The next prime is 12100321223. The reversal of 12100321212 is 21212300121.

It is a junction number, because it is equal to n+sod(n) for n = 12100321191 and 12100321200.

It is a congruent number.

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, 72025638 + ... + 72025805.

It is an arithmetic number, because the mean of its divisors is an integer number (1344480144).

Almost surely, 2^12100321212 is an apocalyptic number.

12100321212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12100321212 is an abundant number, since it is smaller than the sum of its proper divisors (20167202244).

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

12100321212 is a wasteful number, since it uses less digits than its factorization.

12100321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144051457 (or 144051455 counting only the distinct ones).

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

Adding to 12100321212 its reverse (21212300121), we get a palindrome (33312621333).

The spelling of 12100321212 in words is "twelve billion, one hundred million, three hundred twenty-one thousand, two hundred twelve".