30012112121 has 2 divisors, whose sum is σ = 30012112122. Its totient is φ = 30012112120.

The previous prime is 30012112099. The next prime is 30012112129. The reversal of 30012112121 is 12121121003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28131675625 + 1880436496 = 167725^2 + 43364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30012112121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30012112096 and 30012112105.

It is not a weakly prime, because it can be changed into another prime (30012112129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15006056060 + 15006056061.

It is an arithmetic number, because the mean of its divisors is an integer number (15006056061).

Almost surely, 2^30012112121 is an apocalyptic number.

It is an amenable number.

30012112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30012112121 is an equidigital number, since it uses as much as digits as its factorization.

30012112121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 30012112121 its reverse (12121121003), we get a palindrome (42133233124).

The spelling of 30012112121 in words is "thirty billion, twelve million, one hundred twelve thousand, one hundred twenty-one".