221001021212093 has 2 divisors, whose sum is σ = 221001021212094. Its totient is φ = 221001021212092.

The previous prime is 221001021211963. The next prime is 221001021212143. The reversal of 221001021212093 is 390212120100122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206511327732004 + 14489693480089 = 14370502^2 + 3806533^2 .

It is a cyclic number.

It is not a de Polignac number, because 221001021212093 - 2⁴⁴ = 203408835167677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221001021212693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500510606046 + 110500510606047.

It is an arithmetic number, because the mean of its divisors is an integer number (110500510606047).

Almost surely, 2^{221001021212093} is an apocalyptic number.

It is an amenable number.

221001021212093 is a deficient number, since it is larger than the sum of its proper divisors (1).

221001021212093 is an equidigital number, since it uses as much as digits as its factorization.

221001021212093 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 221001021212093 in words is "two hundred twenty-one trillion, one billion, twenty-one million, two hundred twelve thousand, ninety-three".