211142320019 has 2 divisors, whose sum is σ = 211142320020. Its totient is φ = 211142320018.

The previous prime is 211142320013. The next prime is 211142320021. The reversal of 211142320019 is 910023241112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211142320019 is a prime.

It is a super-2 number, since 2×211142320019² (a number of 23 digits) contains 22 as substring.

Together with 211142320021, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211142320019.

It is not a weakly prime, because it can be changed into another prime (211142320013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105571160009 + 105571160010.

It is an arithmetic number, because the mean of its divisors is an integer number (105571160010).

Almost surely, 2^211142320019 is an apocalyptic number.

211142320019 is a deficient number, since it is larger than the sum of its proper divisors (1).

211142320019 is an equidigital number, since it uses as much as digits as its factorization.

211142320019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 211142320019 in words is "two hundred eleven billion, one hundred forty-two million, three hundred twenty thousand, nineteen".