30057302921 has 2 divisors, whose sum is σ = 30057302922. Its totient is φ = 30057302920.

The previous prime is 30057302917. The next prime is 30057302941. The reversal of 30057302921 is 12920375003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20033288521 + 10024014400 = 141539^2 + 100120^2 .

It is a cyclic number.

It is not a de Polignac number, because 30057302921 - 2² = 30057302917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30057302941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15028651460 + 15028651461.

It is an arithmetic number, because the mean of its divisors is an integer number (15028651461).

Almost surely, 2^30057302921 is an apocalyptic number.

It is an amenable number.

30057302921 is a deficient number, since it is larger than the sum of its proper divisors (1).

30057302921 is an equidigital number, since it uses as much as digits as its factorization.

30057302921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

Adding to 30057302921 its reverse (12920375003), we get a palindrome (42977677924).

The spelling of 30057302921 in words is "thirty billion, fifty-seven million, three hundred two thousand, nine hundred twenty-one".