30270239921 has 2 divisors, whose sum is σ = 30270239922. Its totient is φ = 30270239920.

The previous prime is 30270239891. The next prime is 30270239939. The reversal of 30270239921 is 12993207203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26406250000 + 3863989921 = 162500^2 + 62161^2 .

It is a cyclic number.

It is not a de Polignac number, because 30270239921 - 2¹⁴ = 30270223537 is a prime.

It is not a weakly prime, because it can be changed into another prime (30270239971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15135119960 + 15135119961.

It is an arithmetic number, because the mean of its divisors is an integer number (15135119961).

Almost surely, 2^30270239921 is an apocalyptic number.

It is an amenable number.

30270239921 is a deficient number, since it is larger than the sum of its proper divisors (1).

30270239921 is an equidigital number, since it uses as much as digits as its factorization.

30270239921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The spelling of 30270239921 in words is "thirty billion, two hundred seventy million, two hundred thirty-nine thousand, nine hundred twenty-one".