30202109981 has 2 divisors, whose sum is σ = 30202109982. Its totient is φ = 30202109980.

The previous prime is 30202109933. The next prime is 30202109983. The reversal of 30202109981 is 18990120203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30029424100 + 172685881 = 173290^2 + 13141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30202109981 is a prime.

It is a super-2 number, since 2×30202109981² (a number of 22 digits) contains 22 as substring.

Together with 30202109983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30202109983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15101054990 + 15101054991.

It is an arithmetic number, because the mean of its divisors is an integer number (15101054991).

Almost surely, 2^30202109981 is an apocalyptic number.

It is an amenable number.

30202109981 is a deficient number, since it is larger than the sum of its proper divisors (1).

30202109981 is an equidigital number, since it uses as much as digits as its factorization.

30202109981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 30202109981 in words is "thirty billion, two hundred two million, one hundred nine thousand, nine hundred eighty-one".