30121132081 has 2 divisors, whose sum is σ = 30121132082. Its totient is φ = 30121132080.

The previous prime is 30121132061. The next prime is 30121132133. The reversal of 30121132081 is 18023112103.

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., 28412136481 + 1708995600 = 168559^2 + 41340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30121132081 is a prime.

It is a super-2 number, since 2×30121132081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30121132001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060566040 + 15060566041.

It is an arithmetic number, because the mean of its divisors is an integer number (15060566041).

Almost surely, 2^30121132081 is an apocalyptic number.

It is an amenable number.

30121132081 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121132081 is an equidigital number, since it uses as much as digits as its factorization.

30121132081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 30121132081 its reverse (18023112103), we get a palindrome (48144244184).

The spelling of 30121132081 in words is "thirty billion, one hundred twenty-one million, one hundred thirty-two thousand, eighty-one".