30121311239 has 2 divisors, whose sum is σ = 30121311240. Its totient is φ = 30121311238.

The previous prime is 30121311217. The next prime is 30121311251. The reversal of 30121311239 is 93211312103.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30121311239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121311299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060655619 + 15060655620.

It is an arithmetic number, because the mean of its divisors is an integer number (15060655620).

Almost surely, 2^30121311239 is an apocalyptic number.

30121311239 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121311239 is an equidigital number, since it uses as much as digits as its factorization.

30121311239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 30121311239 in words is "thirty billion, one hundred twenty-one million, three hundred eleven thousand, two hundred thirty-nine".