10102110121021 has 4 divisors (see below), whose sum is σ = 10348503050844. Its totient is φ = 9855717191200.

The previous prime is 10102110121013. The next prime is 10102110121063. The reversal of 10102110121021 is 12012101120101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4764554721796 + 5337555399225 = 2182786^2 + 2310315^2 .

It is a cyclic number.

It is not a de Polignac number, because 10102110121021 - 2³ = 10102110121013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10102110120992 and 10102110121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10102110121091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123196464850 + ... + 123196464931.

It is an arithmetic number, because the mean of its divisors is an integer number (2587125762711).

Almost surely, 2^{10102110121021} is an apocalyptic number.

It is an amenable number.

10102110121021 is a deficient number, since it is larger than the sum of its proper divisors (246392929823).

10102110121021 is an equidigital number, since it uses as much as digits as its factorization.

10102110121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246392929822.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10102110121021 its reverse (12012101120101), we get a palindrome (22114211241122).

The spelling of 10102110121021 in words is "ten trillion, one hundred two billion, one hundred ten million, one hundred twenty-one thousand, twenty-one".