12101121220100 has 72 divisors (see below), whose sum is σ = 28649715655008. Its totient is φ = 4399937452800.

The previous prime is 12101121220073. The next prime is 12101121220141. The reversal of 12101121220100 is 102212110121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9793187 + ... + 10959413.

Almost surely, 2^{12101121220100} is an apocalyptic number.

12101121220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12101121220100 is an abundant number, since it is smaller than the sum of its proper divisors (16548594434908).

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

12101121220100 is a wasteful number, since it uses less digits than its factorization.

12101121220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175685 (or 1175678 counting only the distinct ones).

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

Adding to 12101121220100 its reverse (102212110121), we get a palindrome (12203333330221).

The spelling of 12101121220100 in words is "twelve trillion, one hundred one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred".