1921322039233 has 2 divisors, whose sum is σ = 1921322039234. Its totient is φ = 1921322039232.

The previous prime is 1921322039173. The next prime is 1921322039239. The reversal of 1921322039233 is 3329302231291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1102065342849 + 819256696384 = 1049793^2 + 905128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1921322039233 - 2⁹ = 1921322038721 is a prime.

It is not a weakly prime, because it can be changed into another prime (1921322039239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960661019616 + 960661019617.

It is an arithmetic number, because the mean of its divisors is an integer number (960661019617).

Almost surely, 2^{1921322039233} is an apocalyptic number.

It is an amenable number.

1921322039233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921322039233 is an equidigital number, since it uses as much as digits as its factorization.

1921322039233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 40.

The spelling of 1921322039233 in words is "one trillion, nine hundred twenty-one billion, three hundred twenty-two million, thirty-nine thousand, two hundred thirty-three".