221012221220993 has 2 divisors, whose sum is σ = 221012221220994. Its totient is φ = 221012221220992.

The previous prime is 221012221220941. The next prime is 221012221221061. The reversal of 221012221220993 is 399022122210122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184941830846224 + 36070390374769 = 13599332^2 + 6005863^2 .

It is a cyclic number.

It is not a de Polignac number, because 221012221220993 - 2⁶ = 221012221220929 is a prime.

It is not a weakly prime, because it can be changed into another prime (221012221220093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506110610496 + 110506110610497.

It is an arithmetic number, because the mean of its divisors is an integer number (110506110610497).

Almost surely, 2^{221012221220993} is an apocalyptic number.

It is an amenable number.

221012221220993 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012221220993 is an equidigital number, since it uses as much as digits as its factorization.

221012221220993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 221012221220993 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-one million, two hundred twenty thousand, nine hundred ninety-three".