30211110203861 has 2 divisors, whose sum is σ = 30211110203862. Its totient is φ = 30211110203860.

The previous prime is 30211110203849. The next prime is 30211110203881. The reversal of 30211110203861 is 16830201111203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30177509480836 + 33600723025 = 5493406^2 + 183305^2 .

It is an emirp because it is prime and its reverse (16830201111203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30211110203861 - 2⁶ = 30211110203797 is a prime.

It is a super-2 number, since 2×30211110203861² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30211110203881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15105555101930 + 15105555101931.

It is an arithmetic number, because the mean of its divisors is an integer number (15105555101931).

Almost surely, 2^{30211110203861} is an apocalyptic number.

It is an amenable number.

30211110203861 is a deficient number, since it is larger than the sum of its proper divisors (1).

30211110203861 is an equidigital number, since it uses as much as digits as its factorization.

30211110203861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 30211110203861 in words is "thirty trillion, two hundred eleven billion, one hundred ten million, two hundred three thousand, eight hundred sixty-one".