12121120222100 has 36 divisors (see below), whose sum is σ = 27687190406400. Its totient is φ = 4593266609760.

The previous prime is 12121120221979. The next prime is 12121120222109. The reversal of 12121120222100 is 122202112121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121120222109) 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, 3189766580 + ... + 3189770379.

It is an arithmetic number, because the mean of its divisors is an integer number (769088622400).

Almost surely, 2^{12121120222100} is an apocalyptic number.

12121120222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121120222100 is an abundant number, since it is smaller than the sum of its proper divisors (15566070184300).

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

12121120222100 is a wasteful number, since it uses less digits than its factorization.

12121120222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6379536992 (or 6379536985 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12121120222100 its reverse (122202112121), we get a palindrome (12243322334221).

The spelling of 12121120222100 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, one hundred".