30121223125 has 40 divisors (see below), whose sum is σ = 43049369792. Its totient is φ = 20638800000.

The previous prime is 30121223117. The next prime is 30121223137. The reversal of 30121223125 is 52132212103.

It is not a de Polignac number, because 30121223125 - 2³ = 30121223117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30121223096 and 30121223105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11028010 + ... + 11030740.

Almost surely, 2^30121223125 is an apocalyptic number.

30121223125 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30121223125 is a deficient number, since it is larger than the sum of its proper divisors (12928146667).

30121223125 is an equidigital number, since it uses as much as digits as its factorization.

30121223125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5279 (or 5264 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 30121223125 its reverse (52132212103), we get a palindrome (82253435228).

The spelling of 30121223125 in words is "thirty billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred twenty-five".