12101202101221 has 4 divisors (see below), whose sum is σ = 12101293747692. Its totient is φ = 12101110454752.

The previous prime is 12101202101171. The next prime is 12101202101227. The reversal of 12101202101221 is 12210120210121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4033409472225 + 8067792628996 = 2008335^2 + 2840386^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101202101221 - 2²⁷ = 12101067883493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101202101195 and 12101202101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101202101227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45624886 + ... + 45889351.

It is an arithmetic number, because the mean of its divisors is an integer number (3025323436923).

Almost surely, 2^{12101202101221} is an apocalyptic number.

It is an amenable number.

12101202101221 is a deficient number, since it is larger than the sum of its proper divisors (91646471).

12101202101221 is an equidigital number, since it uses as much as digits as its factorization.

12101202101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91646470.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12101202101221 its reverse (12210120210121), we get a palindrome (24311322311342).

The spelling of 12101202101221 in words is "twelve trillion, one hundred one billion, two hundred two million, one hundred one thousand, two hundred twenty-one".