12040422100 has 108 divisors (see below), whose sum is σ = 30695652540. Its totient is φ = 4087104000.

The previous prime is 12040422077. The next prime is 12040422157. The reversal of 12040422100 is 122404021.

It can be written as a sum of positive squares in 6 ways, for example, as 1173610564 + 10866811536 = 34258^2 + 104244^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 482736 + ... + 507064.

It is an arithmetic number, because the mean of its divisors is an integer number (284219005).

Almost surely, 2^12040422100 is an apocalyptic number.

12040422100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12040422100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15347826270).

12040422100 is an abundant number, since it is smaller than the sum of its proper divisors (18655230440).

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

12040422100 is a wasteful number, since it uses less digits than its factorization.

12040422100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24458 (or 24444 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12040422100 its reverse (122404021), we get a palindrome (12162826121).

The spelling of 12040422100 in words is "twelve billion, forty million, four hundred twenty-two thousand, one hundred".