10122110001221 has 4 divisors (see below), whose sum is σ = 10250237976000. Its totient is φ = 9993982026444.

The previous prime is 10122110001191. The next prime is 10122110001251. The reversal of 10122110001221 is 12210001122101.

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 an interprime number because it is at equal distance from previous prime (10122110001191) and next prime (10122110001251).

It is a cyclic number.

It is not a de Polignac number, because 10122110001221 - 2¹⁴ = 10122109984837 is a prime.

It is a super-2 number, since 2×10122110001221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10122110001196 and 10122110001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122110001251) 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, 64063987271 + ... + 64063987428.

It is an arithmetic number, because the mean of its divisors is an integer number (2562559494000).

Almost surely, 2^{10122110001221} is an apocalyptic number.

It is an amenable number.

10122110001221 is a deficient number, since it is larger than the sum of its proper divisors (128127974779).

10122110001221 is an equidigital number, since it uses as much as digits as its factorization.

10122110001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128127974778.

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

Adding to 10122110001221 its reverse (12210001122101), we get a palindrome (22332111123322).

The spelling of 10122110001221 in words is "ten trillion, one hundred twenty-two billion, one hundred ten million, one thousand, two hundred twenty-one".