12122121012100 has 144 divisors (see below), whose sum is σ = 29590971806592. Its totient is φ = 4272048000000.

The previous prime is 12122121012017. The next prime is 12122121012101. The reversal of 12122121012100 is 121012122121.

It is not an unprimeable number, because it can be changed into a prime (12122121012101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5920090 + ... + 7700110.

It is an arithmetic number, because the mean of its divisors is an integer number (205492859768).

Almost surely, 2^{12122121012100} is an apocalyptic number.

12122121012100 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 12122121012100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14795485903296).

12122121012100 is an abundant number, since it is smaller than the sum of its proper divisors (17468850794492).

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

12122121012100 is a wasteful number, since it uses less digits than its factorization.

12122121012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780238 (or 1780231 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12122121012100 its reverse (121012122121), we get a palindrome (12243133134221).

The spelling of 12122121012100 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-one million, twelve thousand, one hundred".