211320301993 has 2 divisors, whose sum is σ = 211320301994. Its totient is φ = 211320301992.

The previous prime is 211320301979. The next prime is 211320302023. The reversal of 211320301993 is 399103023112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207287162944 + 4033139049 = 455288^2 + 63507^2 .

It is a cyclic number.

It is not a de Polignac number, because 211320301993 - 2²¹ = 211318204841 is a prime.

It is a super-3 number, since 3×211320301993³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (211320301943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105660150996 + 105660150997.

It is an arithmetic number, because the mean of its divisors is an integer number (105660150997).

Almost surely, 2^211320301993 is an apocalyptic number.

It is an amenable number.

211320301993 is a deficient number, since it is larger than the sum of its proper divisors (1).

211320301993 is an equidigital number, since it uses as much as digits as its factorization.

211320301993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The spelling of 211320301993 in words is "two hundred eleven billion, three hundred twenty million, three hundred one thousand, nine hundred ninety-three".