21000103331121 has 24 divisors (see below), whose sum is σ = 30726698071680. Its totient is φ = 13818691519776.

The previous prime is 21000103331111. The next prime is 21000103331147. The reversal of 21000103331121 is 12113330100012.

21000103331121 is a `hidden beast` number, since 210 + 0 + 0 + 1 + 0 + 3 + 331 + 121 = 666.

It is not a de Polignac number, because 21000103331121 - 2⁷ = 21000103330993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21000103331094 and 21000103331103.

It is not an unprimeable number, because it can be changed into a prime (21000103331111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2081526 + ... + 6806831.

It is an arithmetic number, because the mean of its divisors is an integer number (1280279086320).

Almost surely, 2^{21000103331121} is an apocalyptic number.

It is an amenable number.

21000103331121 is a deficient number, since it is larger than the sum of its proper divisors (9726594740559).

21000103331121 is a wasteful number, since it uses less digits than its factorization.

21000103331121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8891765 (or 8891762 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21000103331121 its reverse (12113330100012), we get a palindrome (33113433431133).

The spelling of 21000103331121 in words is "twenty-one trillion, one hundred three million, three hundred thirty-one thousand, one hundred twenty-one".