1011123403 has 2 divisors, whose sum is σ = 1011123404. Its totient is φ = 1011123402.

The previous prime is 1011123389. The next prime is 1011123461. The reversal of 1011123403 is 3043211101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011123403 - 2²¹ = 1009026251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011123103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505561701 + 505561702.

It is an arithmetic number, because the mean of its divisors is an integer number (505561702).

Almost surely, 2^1011123403 is an apocalyptic number.

1011123403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011123403 is an equidigital number, since it uses as much as digits as its factorization.

1011123403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1011123403 is about 31798.1666609885. The cubic root of 1011123403 is about 1003.6941375436.

Adding to 1011123403 its reverse (3043211101), we get a palindrome (4054334504).

The spelling of 1011123403 in words is "one billion, eleven million, one hundred twenty-three thousand, four hundred three".