12121101220100 has 18 divisors (see below), whose sum is σ = 26302789647834. Its totient is φ = 4848440488000.

The previous prime is 12121101220093. The next prime is 12121101220147. The reversal of 12121101220100 is 102210112121.

It can be written as a sum of positive squares in 3 ways, for example, as 1928048885764 + 10193052334336 = 1388542^2 + 3192656^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60605506001 + ... + 60605506200.

Almost surely, 2^{12121101220100} is an apocalyptic number.

12121101220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121101220100 is an abundant number, since it is smaller than the sum of its proper divisors (14181688427734).

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

12121101220100 is a wasteful number, since it uses less digits than its factorization.

12121101220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121211012215 (or 121211012208 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12121101220100 its reverse (102210112121), we get a palindrome (12223311332221).

The spelling of 12121101220100 in words is "twelve trillion, one hundred twenty-one billion, one hundred one million, two hundred twenty thousand, one hundred".