211221222943 has 2 divisors, whose sum is σ = 211221222944. Its totient is φ = 211221222942.

The previous prime is 211221222941. The next prime is 211221223033. The reversal of 211221222943 is 349222122112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211221222943 - 2¹ = 211221222941 is a prime.

It is a super-2 number, since 2×211221222943² (a number of 23 digits) contains 22 as substring.

Together with 211221222941, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211221222941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610611471 + 105610611472.

It is an arithmetic number, because the mean of its divisors is an integer number (105610611472).

Almost surely, 2^211221222943 is an apocalyptic number.

211221222943 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221222943 is an equidigital number, since it uses as much as digits as its factorization.

211221222943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The spelling of 211221222943 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, nine hundred forty-three".