1123101081251 has 2 divisors, whose sum is σ = 1123101081252. Its totient is φ = 1123101081250.

The previous prime is 1123101081233. The next prime is 1123101081253. The reversal of 1123101081251 is 1521801013211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123101081251 is a prime.

It is a super-2 number, since 2×1123101081251² (a number of 25 digits) contains 22 as substring.

Together with 1123101081253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1123101081251.

It is not a weakly prime, because it can be changed into another prime (1123101081253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561550540625 + 561550540626.

It is an arithmetic number, because the mean of its divisors is an integer number (561550540626).

Almost surely, 2^{1123101081251} is an apocalyptic number.

1123101081251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123101081251 is an equidigital number, since it uses as much as digits as its factorization.

1123101081251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 26.

Adding to 1123101081251 its reverse (1521801013211), we get a palindrome (2644902094462).

The spelling of 1123101081251 in words is "one trillion, one hundred twenty-three billion, one hundred one million, eighty-one thousand, two hundred fifty-one".