10020121121121 has 4 divisors (see below), whose sum is σ = 13360161494832. Its totient is φ = 6680080747412.

The previous prime is 10020121121119. The next prime is 10020121121137. The reversal of 10020121121121 is 12112112102001.

It is a happy number.

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 10020121121121 - 2¹ = 10020121121119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10020121121121.

It is not an unprimeable number, because it can be changed into a prime (10020121121221) 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, 1670020186851 + ... + 1670020186856.

It is an arithmetic number, because the mean of its divisors is an integer number (3340040373708).

Almost surely, 2^{10020121121121} is an apocalyptic number.

It is an amenable number.

10020121121121 is a deficient number, since it is larger than the sum of its proper divisors (3340040373711).

10020121121121 is an equidigital number, since it uses as much as digits as its factorization.

10020121121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340040373710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10020121121121 its reverse (12112112102001), we get a palindrome (22132233223122).

The spelling of 10020121121121 in words is "ten trillion, twenty billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".