213339777991 has 2 divisors, whose sum is σ = 213339777992. Its totient is φ = 213339777990.

The previous prime is 213339777971. The next prime is 213339778051. The reversal of 213339777991 is 199777933312.

213339777991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213339777991 - 2³¹ = 211192294343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213339777971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106669888995 + 106669888996.

It is an arithmetic number, because the mean of its divisors is an integer number (106669888996).

Almost surely, 2^213339777991 is an apocalyptic number.

213339777991 is a deficient number, since it is larger than the sum of its proper divisors (1).

213339777991 is an equidigital number, since it uses as much as digits as its factorization.

213339777991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13502538, while the sum is 61.

The spelling of 213339777991 in words is "two hundred thirteen billion, three hundred thirty-nine million, seven hundred seventy-seven thousand, nine hundred ninety-one".