7040021321 has 4 divisors (see below), whose sum is σ = 7041085200. Its totient is φ = 7038957444.

The previous prime is 7040021269. The next prime is 7040021371. The reversal of 7040021321 is 1231200407.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1231200407 = 73 ⋅16865759.

It is a cyclic number.

It is not a de Polignac number, because 7040021321 - 2⁶ = 7040021257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7040021293 and 7040021302.

It is not an unprimeable number, because it can be changed into a prime (7040021371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521951 + ... + 535268.

It is an arithmetic number, because the mean of its divisors is an integer number (1760271300).

Almost surely, 2^7040021321 is an apocalyptic number.

It is an amenable number.

7040021321 is a deficient number, since it is larger than the sum of its proper divisors (1063879).

7040021321 is a wasteful number, since it uses less digits than its factorization.

7040021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063878.

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

The square root of 7040021321 is about 83904.8349083651. The cubic root of 7040021321 is about 1916.5698776312.

Adding to 7040021321 its reverse (1231200407), we get a palindrome (8271221728).

The spelling of 7040021321 in words is "seven billion, forty million, twenty-one thousand, three hundred twenty-one".