10102021121 has 4 divisors (see below), whose sum is σ = 10191419652. Its totient is φ = 10012622592.

The previous prime is 10102021117. The next prime is 10102021151. The reversal of 10102021121 is 12112020101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12112020101 = 1597 ⋅7584233.

It can be written as a sum of positive squares in 2 ways, for example, as 1418576896 + 8683444225 = 37664^2 + 93185^2 .

It is a cyclic number.

It is not a de Polignac number, because 10102021121 - 2² = 10102021117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10102021151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44699096 + ... + 44699321.

It is an arithmetic number, because the mean of its divisors is an integer number (2547854913).

Almost surely, 2^10102021121 is an apocalyptic number.

It is an amenable number.

10102021121 is a deficient number, since it is larger than the sum of its proper divisors (89398531).

10102021121 is an equidigital number, since it uses as much as digits as its factorization.

10102021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89398530.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10102021121 its reverse (12112020101), we get a palindrome (22214041222).

The spelling of 10102021121 in words is "ten billion, one hundred two million, twenty-one thousand, one hundred twenty-one".