122142281 has 2 divisors, whose sum is σ = 122142282. Its totient is φ = 122142280.

The previous prime is 122142247. The next prime is 122142283. The reversal of 122142281 is 182241221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121110025 + 1032256 = 11005^2 + 1016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122142281 is a prime.

It is a super-2 number, since 2×122142281² = 29837473615765922, which contains 22 as substring.

Together with 122142283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122142283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61071140 + 61071141.

It is an arithmetic number, because the mean of its divisors is an integer number (61071141).

Almost surely, 2^122142281 is an apocalyptic number.

It is an amenable number.

122142281 is a deficient number, since it is larger than the sum of its proper divisors (1).

122142281 is an equidigital number, since it uses as much as digits as its factorization.

122142281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 23.

The square root of 122142281 is about 11051.7998986590. The cubic root of 122142281 is about 496.1602968392.

The spelling of 122142281 in words is "one hundred twenty-two million, one hundred forty-two thousand, two hundred eighty-one".