30209612498981 has 2 divisors, whose sum is σ = 30209612498982. Its totient is φ = 30209612498980.

The previous prime is 30209612498903. The next prime is 30209612498987. The reversal of 30209612498981 is 18989421690203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26950540514881 + 3259071984100 = 5191391^2 + 1805290^2 .

It is an emirp because it is prime and its reverse (18989421690203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30209612498981 - 2⁴² = 25811565987877 is a prime.

It is a super-2 number, since 2×30209612498981² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30209612498987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15104806249490 + 15104806249491.

It is an arithmetic number, because the mean of its divisors is an integer number (15104806249491).

Almost surely, 2^{30209612498981} is an apocalyptic number.

It is an amenable number.

30209612498981 is a deficient number, since it is larger than the sum of its proper divisors (1).

30209612498981 is an equidigital number, since it uses as much as digits as its factorization.

30209612498981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13436928, while the sum is 62.

The spelling of 30209612498981 in words is "thirty trillion, two hundred nine billion, six hundred twelve million, four hundred ninety-eight thousand, nine hundred eighty-one".