30312220123 has 2 divisors, whose sum is σ = 30312220124. Its totient is φ = 30312220122.

The previous prime is 30312220117. The next prime is 30312220153. The reversal of 30312220123 is 32102221303.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30312220123 - 2¹⁷ = 30312089051 is a prime.

It is a super-2 number, since 2×30312220123² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30312220123.

It is not a weakly prime, because it can be changed into another prime (30312220153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15156110061 + 15156110062.

It is an arithmetic number, because the mean of its divisors is an integer number (15156110062).

Almost surely, 2^30312220123 is an apocalyptic number.

30312220123 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312220123 is an equidigital number, since it uses as much as digits as its factorization.

30312220123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 30312220123 its reverse (32102221303), we get a palindrome (62414441426).

The spelling of 30312220123 in words is "thirty billion, three hundred twelve million, two hundred twenty thousand, one hundred twenty-three".