12121333021873 has 2 divisors, whose sum is σ = 12121333021874. Its totient is φ = 12121333021872.

The previous prime is 12121333021849. The next prime is 12121333021883. The reversal of 12121333021873 is 37812033312121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10590748361649 + 1530584660224 = 3254343^2 + 1237168^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121333021873 - 2¹⁷ = 12121332890801 is a prime.

It is not a weakly prime, because it can be changed into another prime (12121333021843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060666510936 + 6060666510937.

It is an arithmetic number, because the mean of its divisors is an integer number (6060666510937).

Almost surely, 2^{12121333021873} is an apocalyptic number.

It is an amenable number.

12121333021873 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121333021873 is an equidigital number, since it uses as much as digits as its factorization.

12121333021873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

Adding to 12121333021873 its reverse (37812033312121), we get a palindrome (49933366333994).

The spelling of 12121333021873 in words is "twelve trillion, one hundred twenty-one billion, three hundred thirty-three million, twenty-one thousand, eight hundred seventy-three".