21030330123331 has 2 divisors, whose sum is σ = 21030330123332. Its totient is φ = 21030330123330.

The previous prime is 21030330123293. The next prime is 21030330123391. The reversal of 21030330123331 is 13332103303012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21030330123331 is a prime.

It is a super-2 number, since 2×21030330123331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21030330123296 and 21030330123305.

It is not a weakly prime, because it can be changed into another prime (21030330123391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515165061665 + 10515165061666.

It is an arithmetic number, because the mean of its divisors is an integer number (10515165061666).

Almost surely, 2^{21030330123331} is an apocalyptic number.

21030330123331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030330123331 is an equidigital number, since it uses as much as digits as its factorization.

21030330123331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 21030330123331 its reverse (13332103303012), we get a palindrome (34362433426343).

The spelling of 21030330123331 in words is "twenty-one trillion, thirty billion, three hundred thirty million, one hundred twenty-three thousand, three hundred thirty-one".