7124003021 has 2 divisors, whose sum is σ = 7124003022. Its totient is φ = 7124003020.

The previous prime is 7124002999. The next prime is 7124003023. The reversal of 7124003021 is 1203004217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6229155625 + 894847396 = 78925^2 + 29914^2 .

It is an emirp because it is prime and its reverse (1203004217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7124003021 - 2¹⁴ = 7123986637 is a prime.

Together with 7124003023, 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 = 7124002984 and 7124003002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7124003023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3562001510 + 3562001511.

It is an arithmetic number, because the mean of its divisors is an integer number (3562001511).

Almost surely, 2^7124003021 is an apocalyptic number.

It is an amenable number.

7124003021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7124003021 is an equidigital number, since it uses as much as digits as its factorization.

7124003021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 7124003021 is about 84403.8092801504. The cubic root of 7124003021 is about 1924.1608099943.

Adding to 7124003021 its reverse (1203004217), we get a palindrome (8327007238).

The spelling of 7124003021 in words is "seven billion, one hundred twenty-four million, three thousand, twenty-one".