212123043 has 60 divisors (see below), whose sum is σ = 363830544. Its totient is φ = 122839200.

The previous prime is 212123039. The next prime is 212123057. The reversal of 212123043 is 340321212.

It is not a de Polignac number, because 212123043 - 2² = 212123039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212123003) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 224953 + ... + 225893.

Almost surely, 2^212123043 is an apocalyptic number.

212123043 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

212123043 is a deficient number, since it is larger than the sum of its proper divisors (151707501).

212123043 is a wasteful number, since it uses less digits than its factorization.

212123043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 212123043 is about 14564.4444796223. Note that the first 4 decimals coincide. The cubic root of 212123043 is about 596.3885307641.

Adding to 212123043 its reverse (340321212), we get a palindrome (552444255).

The spelling of 212123043 in words is "two hundred twelve million, one hundred twenty-three thousand, forty-three".