1111051401623 has 2 divisors, whose sum is σ = 1111051401624. Its totient is φ = 1111051401622.

The previous prime is 1111051401563. The next prime is 1111051401643. The reversal of 1111051401623 is 3261041501111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111051401623 - 2³⁰ = 1109977659799 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111051401592 and 1111051401601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111051401643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555525700811 + 555525700812.

It is an arithmetic number, because the mean of its divisors is an integer number (555525700812).

Almost surely, 2^{1111051401623} is an apocalyptic number.

1111051401623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111051401623 is an equidigital number, since it uses as much as digits as its factorization.

1111051401623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 26.

Adding to 1111051401623 its reverse (3261041501111), we get a palindrome (4372092902734).

The spelling of 1111051401623 in words is "one trillion, one hundred eleven billion, fifty-one million, four hundred one thousand, six hundred twenty-three".