30121021313 has 2 divisors, whose sum is σ = 30121021314. Its totient is φ = 30121021312.

The previous prime is 30121021279. The next prime is 30121021339. The reversal of 30121021313 is 31312012103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30014869504 + 106151809 = 173248^2 + 10303^2 .

It is a cyclic number.

It is not a de Polignac number, because 30121021313 - 2¹⁴ = 30121004929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30121021291 and 30121021300.

It is not a weakly prime, because it can be changed into another prime (30121021373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060510656 + 15060510657.

It is an arithmetic number, because the mean of its divisors is an integer number (15060510657).

Almost surely, 2^30121021313 is an apocalyptic number.

It is an amenable number.

30121021313 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121021313 is an equidigital number, since it uses as much as digits as its factorization.

30121021313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 30121021313 its reverse (31312012103), we get a palindrome (61433033416).

The spelling of 30121021313 in words is "thirty billion, one hundred twenty-one million, twenty-one thousand, three hundred thirteen".