10101120121 has 4 divisors (see below), whose sum is σ = 10101587044. Its totient is φ = 10100653200.

The previous prime is 10101120101. The next prime is 10101120137. The reversal of 10101120121 is 12102110101.

10101120121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12102110101 = 1559 ⋅7762739.

It can be written as a sum of positive squares in 2 ways, for example, as 6136528896 + 3964591225 = 78336^2 + 62965^2 .

It is a cyclic number.

It is not a de Polignac number, because 10101120121 - 2⁵ = 10101120089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10101120098 and 10101120107.

It is not an unprimeable number, because it can be changed into a prime (10101120101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199350 + ... + 244831.

It is an arithmetic number, because the mean of its divisors is an integer number (2525396761).

Almost surely, 2^10101120121 is an apocalyptic number.

It is an amenable number.

10101120121 is a deficient number, since it is larger than the sum of its proper divisors (466923).

10101120121 is an equidigital number, since it uses as much as digits as its factorization.

10101120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466922.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10101120121 its reverse (12102110101), we get a palindrome (22203230222).

The spelling of 10101120121 in words is "ten billion, one hundred one million, one hundred twenty thousand, one hundred twenty-one".