122000251 has 2 divisors, whose sum is σ = 122000252. Its totient is φ = 122000250.

The previous prime is 122000239. The next prime is 122000293. The reversal of 122000251 is 152000221.

It is a weak prime.

It is an emirp because it is prime and its reverse (152000221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122000251 is a prime.

It is a super-2 number, since 2×122000251² = 29768122488126002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122006251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61000125 + 61000126.

It is an arithmetic number, because the mean of its divisors is an integer number (61000126).

Almost surely, 2^122000251 is an apocalyptic number.

122000251 is a deficient number, since it is larger than the sum of its proper divisors (1).

122000251 is an equidigital number, since it uses as much as digits as its factorization.

122000251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 122000251 is about 11045.3723794175. The cubic root of 122000251 is about 495.9679065148.

Adding to 122000251 its reverse (152000221), we get a palindrome (274000472).

The spelling of 122000251 in words is "one hundred twenty-two million, two hundred fifty-one", and thus it is an aban number.