213780405211 has 2 divisors, whose sum is σ = 213780405212. Its totient is φ = 213780405210.

The previous prime is 213780405127. The next prime is 213780405259. The reversal of 213780405211 is 112504087312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213780405211 is a prime.

It is not a weakly prime, because it can be changed into another prime (213780405271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106890202605 + 106890202606.

It is an arithmetic number, because the mean of its divisors is an integer number (106890202606).

Almost surely, 2^213780405211 is an apocalyptic number.

213780405211 is a deficient number, since it is larger than the sum of its proper divisors (1).

213780405211 is an equidigital number, since it uses as much as digits as its factorization.

213780405211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 213780405211 in words is "two hundred thirteen billion, seven hundred eighty million, four hundred five thousand, two hundred eleven".