10121121 has 24 divisors (see below), whose sum is σ = 15185664. Its totient is φ = 6491520.

The previous prime is 10121119. The next prime is 10121131. The reversal of 10121121 is 12112101.

It is a happy number.

It is not a de Polignac number, because 10121121 - 2¹ = 10121119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (10121131) 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 23 ways as a sum of consecutive naturals, for example, 29865 + ... + 30201.

It is an arithmetic number, because the mean of its divisors is an integer number (632736).

Almost surely, 2^10121121 is an apocalyptic number.

It is an amenable number.

10121121 is a deficient number, since it is larger than the sum of its proper divisors (5064543).

10121121 is a wasteful number, since it uses less digits than its factorization.

10121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 10121121 is about 3181.3709309038. The cubic root of 10121121 is about 216.3098049255.

Adding to 10121121 its reverse (12112101), we get a palindrome (22233222).

The spelling of 10121121 in words is "ten million, one hundred twenty-one thousand, one hundred twenty-one".