201221122021039 has 2 divisors, whose sum is σ = 201221122021040. Its totient is φ = 201221122021038.

The previous prime is 201221122020977. The next prime is 201221122021063. The reversal of 201221122021039 is 930120221122102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201221122021039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201221122020998 and 201221122021016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201221122021079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610561010519 + 100610561010520.

It is an arithmetic number, because the mean of its divisors is an integer number (100610561010520).

Almost surely, 2^{201221122021039} is an apocalyptic number.

201221122021039 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221122021039 is an equidigital number, since it uses as much as digits as its factorization.

201221122021039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 201221122021039 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred twenty-two million, twenty-one thousand, thirty-nine".