30021031421 has 2 divisors, whose sum is σ = 30021031422. Its totient is φ = 30021031420.

The previous prime is 30021031387. The next prime is 30021031429. The reversal of 30021031421 is 12413012003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18167265796 + 11853765625 = 134786^2 + 108875^2 .

It is a cyclic number.

It is not a de Polignac number, because 30021031421 - 2³⁴ = 12841162237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30021031421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30021031429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15010515710 + 15010515711.

It is an arithmetic number, because the mean of its divisors is an integer number (15010515711).

Almost surely, 2^30021031421 is an apocalyptic number.

It is an amenable number.

30021031421 is a deficient number, since it is larger than the sum of its proper divisors (1).

30021031421 is an equidigital number, since it uses as much as digits as its factorization.

30021031421 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 30021031421 its reverse (12413012003), we get a palindrome (42434043424).

The spelling of 30021031421 in words is "thirty billion, twenty-one million, thirty-one thousand, four hundred twenty-one".