201221002121039 has 2 divisors, whose sum is σ = 201221002121040. Its totient is φ = 201221002121038.

The previous prime is 201221002121021. The next prime is 201221002121071. The reversal of 201221002121039 is 930121200122102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201221002121039 - 2⁴⁴ = 183628816076623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201221002120999 and 201221002121017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201221002127039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610501060519 + 100610501060520.

It is an arithmetic number, because the mean of its divisors is an integer number (100610501060520).

Almost surely, 2^{201221002121039} is an apocalyptic number.

201221002121039 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221002121039 is an equidigital number, since it uses as much as digits as its factorization.

201221002121039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 201221002121039 in words is "two hundred one trillion, two hundred twenty-one billion, two million, one hundred twenty-one thousand, thirty-nine".