10202121121121 has 4 divisors (see below), whose sum is σ = 10645691604672. Its totient is φ = 9758550637572.

The previous prime is 10202121121097. The next prime is 10202121121141. The reversal of 10202121121121 is 12112112120201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10202121121121 - 2²⁶ = 10202054012257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10202121121121.

It is not an unprimeable number, because it can be changed into a prime (10202121121141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221785241741 + ... + 221785241786.

It is an arithmetic number, because the mean of its divisors is an integer number (2661422901168).

Almost surely, 2^{10202121121121} is an apocalyptic number.

It is an amenable number.

10202121121121 is a deficient number, since it is larger than the sum of its proper divisors (443570483551).

10202121121121 is an equidigital number, since it uses as much as digits as its factorization.

10202121121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443570483550.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10202121121121 its reverse (12112112120201), we get a palindrome (22314233241322).

The spelling of 10202121121121 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".