30001240981 has 2 divisors, whose sum is σ = 30001240982. Its totient is φ = 30001240980.

The previous prime is 30001240937. The next prime is 30001241033. The reversal of 30001240981 is 18904210003.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18835092081 + 11166148900 = 137241^2 + 105670^2 .

It is a cyclic number.

It is not a de Polignac number, because 30001240981 - 2²¹ = 29999143829 is a prime.

It is a super-2 number, since 2×30001240981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30001240681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15000620490 + 15000620491.

It is an arithmetic number, because the mean of its divisors is an integer number (15000620491).

Almost surely, 2^30001240981 is an apocalyptic number.

It is an amenable number.

30001240981 is a deficient number, since it is larger than the sum of its proper divisors (1).

30001240981 is an equidigital number, since it uses as much as digits as its factorization.

30001240981 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 28.

Adding to 30001240981 its reverse (18904210003), we get a palindrome (48905450984).

The spelling of 30001240981 in words is "thirty billion, one million, two hundred forty thousand, nine hundred eighty-one".