12051821123 has 2 divisors, whose sum is σ = 12051821124. Its totient is φ = 12051821122.

The previous prime is 12051821081. The next prime is 12051821141. The reversal of 12051821123 is 32112815021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12051821123 is a prime.

It is a super-2 number, since 2×12051821123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12051821092 and 12051821101.

It is not a weakly prime, because it can be changed into another prime (12051821153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6025910561 + 6025910562.

It is an arithmetic number, because the mean of its divisors is an integer number (6025910562).

Almost surely, 2^12051821123 is an apocalyptic number.

12051821123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12051821123 is an equidigital number, since it uses as much as digits as its factorization.

12051821123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The spelling of 12051821123 in words is "twelve billion, fifty-one million, eight hundred twenty-one thousand, one hundred twenty-three".