10202121021121 has 4 divisors (see below), whose sum is σ = 10214081304532. Its totient is φ = 10190160737712.

The previous prime is 10202121021089. The next prime is 10202121021161. The reversal of 10202121021121 is 12112012120201.

10202121021121 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5523270826896 + 4678850194225 = 2350164^2 + 2163065^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202121021121 - 2⁵ = 10202121021089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10202121021095 and 10202121021104.

It is not an unprimeable number, because it can be changed into a prime (10202121021161) 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, 5980140426 + ... + 5980142131.

It is an arithmetic number, because the mean of its divisors is an integer number (2553520326133).

Almost surely, 2^{10202121021121} is an apocalyptic number.

It is an amenable number.

10202121021121 is a deficient number, since it is larger than the sum of its proper divisors (11960283411).

10202121021121 is an equidigital number, since it uses as much as digits as its factorization.

10202121021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11960283410.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10202121021121 its reverse (12112012120201), we get a palindrome (22314133141322).

The spelling of 10202121021121 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, twenty-one thousand, one hundred twenty-one".