30121321289 has 2 divisors, whose sum is σ = 30121321290. Its totient is φ = 30121321288.

The previous prime is 30121321261. The next prime is 30121321303. The reversal of 30121321289 is 98212312103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29169907264 + 951414025 = 170792^2 + 30845^2 .

It is a cyclic number.

It is not a de Polignac number, because 30121321289 - 2²⁰ = 30120272713 is a prime.

It is not a weakly prime, because it can be changed into another prime (30121321589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060660644 + 15060660645.

It is an arithmetic number, because the mean of its divisors is an integer number (15060660645).

Almost surely, 2^30121321289 is an apocalyptic number.

It is an amenable number.

30121321289 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121321289 is an equidigital number, since it uses as much as digits as its factorization.

30121321289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 30121321289 in words is "thirty billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred eighty-nine".