100001221000012 has 48 divisors (see below), whose sum is σ = 179947998397440. Its totient is φ = 48596757148800.

The previous prime is 100001220999983. The next prime is 100001221000013. The reversal of 100001221000012 is 210000122100001.

It is not an unprimeable number, because it can be changed into a prime (100001221000013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531411723 + ... + 531599869.

It is an arithmetic number, because the mean of its divisors is an integer number (3748916633280).

Almost surely, 2^{100001221000012} is an apocalyptic number.

It is an amenable number.

100001221000012 is a deficient number, since it is larger than the sum of its proper divisors (79946777397428).

100001221000012 is a wasteful number, since it uses less digits than its factorization.

100001221000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200422 (or 200420 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100001221000012 its reverse (210000122100001), we get a palindrome (310001343100013).

It can be divided in two parts, 10000122100001 and 2, that multiplied together give a palindrome (20000244200002).

The spelling of 100001221000012 in words is "one hundred trillion, one billion, two hundred twenty-one million, twelve", and thus it is an aban number.