12031221210100 has 36 divisors (see below), whose sum is σ = 27008017274700. Its totient is φ = 4646540604160.

The previous prime is 12031221210097. The next prime is 12031221210101. The reversal of 12031221210100 is 101212213021.

It can be written as a sum of positive squares in 6 ways, for example, as 2345345228304 + 9685875981796 = 1531452^2 + 3112214^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031221210101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2074345585 + ... + 2074351384.

It is an arithmetic number, because the mean of its divisors is an integer number (750222702075).

Almost surely, 2^{12031221210100} is an apocalyptic number.

12031221210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12031221210100 is an abundant number, since it is smaller than the sum of its proper divisors (14976796064600).

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

12031221210100 is a wasteful number, since it uses less digits than its factorization.

12031221210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148697012 (or 4148697005 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12031221210100 its reverse (101212213021), we get a palindrome (12132433423121).

The spelling of 12031221210100 in words is "twelve trillion, thirty-one billion, two hundred twenty-one million, two hundred ten thousand, one hundred".