1021123 has 2 divisors, whose sum is σ = 1021124. Its totient is φ = 1021122.

The previous prime is 1021093. The next prime is 1021127. The reversal of 1021123 is 3211201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021123 - 2⁵ = 1021091 is a prime.

It is a super-2 number, since 2×1021123² = 2085384362258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1021127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510561 + 510562.

It is an arithmetic number, because the mean of its divisors is an integer number (510562).

2^1021123 is an apocalyptic number.

1021123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021123 is an equidigital number, since it uses as much as digits as its factorization.

1021123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1021123 is about 1010.5063087383. The cubic root of 1021123 is about 100.6991998022.

Adding to 1021123 its reverse (3211201), we get a palindrome (4232324).

It can be divided in two parts, 102 and 1123, that added together give a triangular number (1225 = T₄₉).

The spelling of 1021123 in words is "one million, twenty-one thousand, one hundred twenty-three".