10020200121121 has 4 divisors (see below), whose sum is σ = 10021923884052. Its totient is φ = 10018476358192.

The previous prime is 10020200121119. The next prime is 10020200121131. The reversal of 10020200121121 is 12112100202001.

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 8753100942096 + 1267099179025 = 2958564^2 + 1125655^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020200121121 - 2¹ = 10020200121119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10020200121131) 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, 861872746 + ... + 861884371.

It is an arithmetic number, because the mean of its divisors is an integer number (2505480971013).

Almost surely, 2^{10020200121121} is an apocalyptic number.

It is an amenable number.

10020200121121 is a deficient number, since it is larger than the sum of its proper divisors (1723762931).

10020200121121 is an equidigital number, since it uses as much as digits as its factorization.

10020200121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723762930.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10020200121121 its reverse (12112100202001), we get a palindrome (22132300323122).

The spelling of 10020200121121 in words is "ten trillion, twenty billion, two hundred million, one hundred twenty-one thousand, one hundred twenty-one".