30121210403 has 2 divisors, whose sum is σ = 30121210404. Its totient is φ = 30121210402.

The previous prime is 30121210381. The next prime is 30121210411. The reversal of 30121210403 is 30401212103.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30121210403 - 2¹⁸ = 30120948259 is a prime.

It is a super-2 number, since 2×30121210403² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30121210003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060605201 + 15060605202.

It is an arithmetic number, because the mean of its divisors is an integer number (15060605202).

Almost surely, 2^30121210403 is an apocalyptic number.

30121210403 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121210403 is an equidigital number, since it uses as much as digits as its factorization.

30121210403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 30121210403 its reverse (30401212103), we get a palindrome (60522422506).

The spelling of 30121210403 in words is "thirty billion, one hundred twenty-one million, two hundred ten thousand, four hundred three".