12100101221021 has 4 divisors (see below), whose sum is σ = 13200110422944. Its totient is φ = 11000092019100.

The previous prime is 12100101221017. The next prime is 12100101221041. The reversal of 12100101221021 is 12012210100121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12100101221021 - 2² = 12100101221017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100101220987 and 12100101221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100101221041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550004600945 + ... + 550004600966.

It is an arithmetic number, because the mean of its divisors is an integer number (3300027605736).

Almost surely, 2^{12100101221021} is an apocalyptic number.

12100101221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12100101221021 is a deficient number, since it is larger than the sum of its proper divisors (1100009201923).

12100101221021 is a wasteful number, since it uses less digits than its factorization.

12100101221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100009201922.

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

Adding to 12100101221021 its reverse (12012210100121), we get a palindrome (24112311321142).

The spelling of 12100101221021 in words is "twelve trillion, one hundred billion, one hundred one million, two hundred twenty-one thousand, twenty-one".