13212124109 has 2 divisors, whose sum is σ = 13212124110. Its totient is φ = 13212124108.

The previous prime is 13212124099. The next prime is 13212124111. The reversal of 13212124109 is 90142121231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12814919209 + 397204900 = 113203^2 + 19930^2 .

It is a cyclic number.

It is not a de Polignac number, because 13212124109 - 2⁸ = 13212123853 is a prime.

Together with 13212124111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13212124129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6606062054 + 6606062055.

It is an arithmetic number, because the mean of its divisors is an integer number (6606062055).

Almost surely, 2^13212124109 is an apocalyptic number.

It is an amenable number.

13212124109 is a deficient number, since it is larger than the sum of its proper divisors (1).

13212124109 is an equidigital number, since it uses as much as digits as its factorization.

13212124109 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 13212124109 in words is "thirteen billion, two hundred twelve million, one hundred twenty-four thousand, one hundred nine".