122147381 has 2 divisors, whose sum is σ = 122147382. Its totient is φ = 122147380.

The previous prime is 122147359. The next prime is 122147383. The reversal of 122147381 is 183741221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110355025 + 11792356 = 10505^2 + 3434^2 .

It is an emirp because it is prime and its reverse (183741221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122147381 - 2⁶ = 122147317 is a prime.

It is a super-2 number, since 2×122147381² = 29839965370318322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 122147383, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122147383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61073690 + 61073691.

It is an arithmetic number, because the mean of its divisors is an integer number (61073691).

Almost surely, 2^122147381 is an apocalyptic number.

It is an amenable number.

122147381 is a deficient number, since it is larger than the sum of its proper divisors (1).

122147381 is an equidigital number, since it uses as much as digits as its factorization.

122147381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 29.

The square root of 122147381 is about 11052.0306278982. The cubic root of 122147381 is about 496.1672023985.

The spelling of 122147381 in words is "one hundred twenty-two million, one hundred forty-seven thousand, three hundred eighty-one".