10121221121 has 8 divisors (see below), whose sum is σ = 11067688800. Its totient is φ = 9179146240.

The previous prime is 10121221111. The next prime is 10121221147. The reversal of 10121221121 is 12112212101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10121221121 - 2¹⁰ = 10121220097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121221096 and 10121221105.

It is not an unprimeable number, because it can be changed into a prime (10121221111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093376 + ... + 1102593.

It is an arithmetic number, because the mean of its divisors is an integer number (1383461100).

Almost surely, 2^10121221121 is an apocalyptic number.

10121221121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10121221121 is a deficient number, since it is larger than the sum of its proper divisors (946467679).

10121221121 is a wasteful number, since it uses less digits than its factorization.

10121221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196399.

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

Adding to 10121221121 its reverse (12112212101), we get a palindrome (22233433222).

The spelling of 10121221121 in words is "ten billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".