30556564121 has 2 divisors, whose sum is σ = 30556564122. Its totient is φ = 30556564120.

The previous prime is 30556564111. The next prime is 30556564147. The reversal of 30556564121 is 12146565503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29206810000 + 1349754121 = 170900^2 + 36739^2 .

It is a cyclic number.

It is not a de Polignac number, because 30556564121 - 2⁶ = 30556564057 is a prime.

It is a super-2 number, since 2×30556564121² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30556564111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15278282060 + 15278282061.

It is an arithmetic number, because the mean of its divisors is an integer number (15278282061).

Almost surely, 2^30556564121 is an apocalyptic number.

It is an amenable number.

30556564121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30556564121 is an equidigital number, since it uses as much as digits as its factorization.

30556564121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 30556564121 in words is "thirty billion, five hundred fifty-six million, five hundred sixty-four thousand, one hundred twenty-one".