1835123018921 has 2 divisors, whose sum is σ = 1835123018922. Its totient is φ = 1835123018920.

The previous prime is 1835123018881. The next prime is 1835123018933. The reversal of 1835123018921 is 1298103215381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1747485705625 + 87637313296 = 1321925^2 + 296036^2 .

It is a cyclic number.

It is not a de Polignac number, because 1835123018921 - 2⁶ = 1835123018857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1835123018951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 917561509460 + 917561509461.

It is an arithmetic number, because the mean of its divisors is an integer number (917561509461).

Almost surely, 2^{1835123018921} is an apocalyptic number.

It is an amenable number.

1835123018921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1835123018921 is an equidigital number, since it uses as much as digits as its factorization.

1835123018921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 1835123018921 in words is "one trillion, eight hundred thirty-five billion, one hundred twenty-three million, eighteen thousand, nine hundred twenty-one".