3440123021 has 2 divisors, whose sum is σ = 3440123022. Its totient is φ = 3440123020.

The previous prime is 3440122997. The next prime is 3440123047. The reversal of 3440123021 is 1203210443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3247746121 + 192376900 = 56989^2 + 13870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3440123021 is a prime.

It is a super-2 number, since 2×3440123021² = 23668892799228332882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3440122984 and 3440123002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3440173021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1720061510 + 1720061511.

It is an arithmetic number, because the mean of its divisors is an integer number (1720061511).

Almost surely, 2^3440123021 is an apocalyptic number.

It is an amenable number.

3440123021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3440123021 is an equidigital number, since it uses as much as digits as its factorization.

3440123021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 3440123021 is about 58652.5619304051. The cubic root of 3440123021 is about 1509.5864576645.

Adding to 3440123021 its reverse (1203210443), we get a palindrome (4643333464).

The spelling of 3440123021 in words is "three billion, four hundred forty million, one hundred twenty-three thousand, twenty-one".