122212451 has 2 divisors, whose sum is σ = 122212452. Its totient is φ = 122212450.

The previous prime is 122212421. The next prime is 122212469. The reversal of 122212451 is 154212221.

It is a strong prime.

It is an emirp because it is prime and its reverse (154212221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122212451 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122212421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61106225 + 61106226.

It is an arithmetic number, because the mean of its divisors is an integer number (61106226).

Almost surely, 2^122212451 is an apocalyptic number.

122212451 is a deficient number, since it is larger than the sum of its proper divisors (1).

122212451 is an equidigital number, since it uses as much as digits as its factorization.

122212451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 20.

The square root of 122212451 is about 11054.9740388659. The cubic root of 122212451 is about 496.2552923444.

Adding to 122212451 its reverse (154212221), we get a palindrome (276424672).

The spelling of 122212451 in words is "one hundred twenty-two million, two hundred twelve thousand, four hundred fifty-one".