1669121801233 has 2 divisors, whose sum is σ = 1669121801234. Its totient is φ = 1669121801232.

The previous prime is 1669121801227. The next prime is 1669121801251. The reversal of 1669121801233 is 3321081219661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1656531165969 + 12590635264 = 1287063^2 + 112208^2 .

It is a cyclic number.

It is not a de Polignac number, because 1669121801233 - 2⁹ = 1669121800721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1669121801233.

It is not a weakly prime, because it can be changed into another prime (1669121801533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834560900616 + 834560900617.

It is an arithmetic number, because the mean of its divisors is an integer number (834560900617).

Almost surely, 2^{1669121801233} is an apocalyptic number.

It is an amenable number.

1669121801233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669121801233 is an equidigital number, since it uses as much as digits as its factorization.

1669121801233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 1669121801233 in words is "one trillion, six hundred sixty-nine billion, one hundred twenty-one million, eight hundred one thousand, two hundred thirty-three".