10122010121221 has 4 divisors (see below), whose sum is σ = 10122210961344. Its totient is φ = 10121809281100.

The previous prime is 10122010121147. The next prime is 10122010121233. The reversal of 10122010121221 is 12212101022101.

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 10122010121221 - 2²⁹ = 10121473250309 is a prime.

It is a super-2 number, since 2×10122010121221² (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 = 10122010121195 and 10122010121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122010121291) 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, 100344445 + ... + 100445266.

It is an arithmetic number, because the mean of its divisors is an integer number (2530552740336).

Almost surely, 2^{10122010121221} is an apocalyptic number.

It is an amenable number.

10122010121221 is a deficient number, since it is larger than the sum of its proper divisors (200840123).

10122010121221 is an equidigital number, since it uses as much as digits as its factorization.

10122010121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200840122.

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

Adding to 10122010121221 its reverse (12212101022101), we get a palindrome (22334111143322).

The spelling of 10122010121221 in words is "ten trillion, one hundred twenty-two billion, ten million, one hundred twenty-one thousand, two hundred twenty-one".