213119991947 has 2 divisors, whose sum is σ = 213119991948. Its totient is φ = 213119991946.

The previous prime is 213119991907. The next prime is 213119992027. The reversal of 213119991947 is 749199911312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213119991947 - 2¹⁸ = 213119729803 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213119991892 and 213119991901.

It is not a weakly prime, because it can be changed into another prime (213119991907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106559995973 + 106559995974.

It is an arithmetic number, because the mean of its divisors is an integer number (106559995974).

Almost surely, 2^213119991947 is an apocalyptic number.

213119991947 is a deficient number, since it is larger than the sum of its proper divisors (1).

213119991947 is an equidigital number, since it uses as much as digits as its factorization.

213119991947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 56.

The spelling of 213119991947 in words is "two hundred thirteen billion, one hundred nineteen million, nine hundred ninety-one thousand, nine hundred forty-seven".