201221212039 has 2 divisors, whose sum is σ = 201221212040. Its totient is φ = 201221212038.

The previous prime is 201221212019. The next prime is 201221212051. The reversal of 201221212039 is 930212122102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201221212039 - 2⁷ = 201221211911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201221212019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610606019 + 100610606020.

It is an arithmetic number, because the mean of its divisors is an integer number (100610606020).

Almost surely, 2^201221212039 is an apocalyptic number.

201221212039 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221212039 is an equidigital number, since it uses as much as digits as its factorization.

201221212039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 201221212039 in words is "two hundred one billion, two hundred twenty-one million, two hundred twelve thousand, thirty-nine".