221012039 has 2 divisors, whose sum is σ = 221012040. Its totient is φ = 221012038.

The previous prime is 221011993. The next prime is 221012069. The reversal of 221012039 is 930210122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221012039 - 2⁸ = 221011783 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221012039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506019 + 110506020.

It is an arithmetic number, because the mean of its divisors is an integer number (110506020).

Almost surely, 2^221012039 is an apocalyptic number.

221012039 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012039 is an equidigital number, since it uses as much as digits as its factorization.

221012039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 221012039 is about 14866.4736571925. The cubic root of 221012039 is about 604.6053378506.

The spelling of 221012039 in words is "two hundred twenty-one million, twelve thousand, thirty-nine".