221321202232993 has 2 divisors, whose sum is σ = 221321202232994. Its totient is φ = 221321202232992.

The previous prime is 221321202232957. The next prime is 221321202233099. The reversal of 221321202232993 is 399232202123122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170918415574929 + 50402786658064 = 13073577^2 + 7099492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221321202232993 is a prime.

It is not a weakly prime, because it can be changed into another prime (221321202232903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110660601116496 + 110660601116497.

It is an arithmetic number, because the mean of its divisors is an integer number (110660601116497).

Almost surely, 2^{221321202232993} is an apocalyptic number.

It is an amenable number.

221321202232993 is a deficient number, since it is larger than the sum of its proper divisors (1).

221321202232993 is an equidigital number, since it uses as much as digits as its factorization.

221321202232993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 221321202232993 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, two hundred two million, two hundred thirty-two thousand, nine hundred ninety-three".