212123012147 has 2 divisors, whose sum is σ = 212123012148. Its totient is φ = 212123012146.

The previous prime is 212123012117. The next prime is 212123012149. The reversal of 212123012147 is 741210321212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212123012147 - 2³⁰ = 211049270323 is a prime.

Together with 212123012149, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (212123012149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106061506073 + 106061506074.

It is an arithmetic number, because the mean of its divisors is an integer number (106061506074).

Almost surely, 2^212123012147 is an apocalyptic number.

212123012147 is a deficient number, since it is larger than the sum of its proper divisors (1).

212123012147 is an equidigital number, since it uses as much as digits as its factorization.

212123012147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 212123012147 its reverse (741210321212), we get a palindrome (953333333359).

The spelling of 212123012147 in words is "two hundred twelve billion, one hundred twenty-three million, twelve thousand, one hundred forty-seven".