30420121031 has 2 divisors, whose sum is σ = 30420121032. Its totient is φ = 30420121030.

The previous prime is 30420121003. The next prime is 30420121033. The reversal of 30420121031 is 13012102403.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30420121031 - 2¹⁴ = 30420104647 is a prime.

It is a super-2 number, since 2×30420121031² (a number of 22 digits) contains 22 as substring.

Together with 30420121033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30420121033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210060515 + 15210060516.

It is an arithmetic number, because the mean of its divisors is an integer number (15210060516).

Almost surely, 2^30420121031 is an apocalyptic number.

30420121031 is a deficient number, since it is larger than the sum of its proper divisors (1).

30420121031 is an equidigital number, since it uses as much as digits as its factorization.

30420121031 is an odious number, because the sum of its binary digits is odd.

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

Adding to 30420121031 its reverse (13012102403), we get a palindrome (43432223434).

The spelling of 30420121031 in words is "thirty billion, four hundred twenty million, one hundred twenty-one thousand, thirty-one".