30103456021 has 2 divisors, whose sum is σ = 30103456022. Its totient is φ = 30103456020.

The previous prime is 30103455997. The next prime is 30103456081. The reversal of 30103456021 is 12065430103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27678976900 + 2424479121 = 166370^2 + 49239^2 .

It is a cyclic number.

It is not a de Polignac number, because 30103456021 - 2²¹ = 30101358869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30103456081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15051728010 + 15051728011.

It is an arithmetic number, because the mean of its divisors is an integer number (15051728011).

Almost surely, 2^30103456021 is an apocalyptic number.

It is an amenable number.

30103456021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30103456021 is an equidigital number, since it uses as much as digits as its factorization.

30103456021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 30103456021 its reverse (12065430103), we get a palindrome (42168886124).

The spelling of 30103456021 in words is "thirty billion, one hundred three million, four hundred fifty-six thousand, twenty-one".