212123253443 has 2 divisors, whose sum is σ = 212123253444. Its totient is φ = 212123253442.

The previous prime is 212123253379. The next prime is 212123253509. The reversal of 212123253443 is 344352321212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212123253443 - 2⁶ = 212123253379 is a prime.

It is a super-2 number, since 2×212123253443² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212123253743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106061626721 + 106061626722.

It is an arithmetic number, because the mean of its divisors is an integer number (106061626722).

Almost surely, 2^212123253443 is an apocalyptic number.

212123253443 is a deficient number, since it is larger than the sum of its proper divisors (1).

212123253443 is an equidigital number, since it uses as much as digits as its factorization.

212123253443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 32.

Adding to 212123253443 its reverse (344352321212), we get a palindrome (556475574655).

The spelling of 212123253443 in words is "two hundred twelve billion, one hundred twenty-three million, two hundred fifty-three thousand, four hundred forty-three".