11111000051 has 2 divisors, whose sum is σ = 11111000052. Its totient is φ = 11111000050.

The previous prime is 11111000027. The next prime is 11111000053. The reversal of 11111000051 is 15000011111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11111000051 - 2²² = 11106805747 is a prime.

Together with 11111000053, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11110999996 and 11111000041.

It is not a weakly prime, because it can be changed into another prime (11111000053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555500025 + 5555500026.

It is an arithmetic number, because the mean of its divisors is an integer number (5555500026).

Almost surely, 2^11111000051 is an apocalyptic number.

11111000051 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111000051 is an equidigital number, since it uses as much as digits as its factorization.

11111000051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5, while the sum is 11.

Adding to 11111000051 its reverse (15000011111), we get a palindrome (26111011162).

The spelling of 11111000051 in words is "eleven billion, one hundred eleven million, fifty-one", and thus it is an aban number.