7052209921 has 4 divisors (see below), whose sum is σ = 7052781744. Its totient is φ = 7051638100.

The previous prime is 7052209907. The next prime is 7052209949. The reversal of 7052209921 is 1299022507.

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: 1299022507 = 103 ⋅12611869.

It is a cyclic number.

It is not a de Polignac number, because 7052209921 - 2⁷ = 7052209793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7052209951) 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 in 3 ways as a sum of consecutive naturals, for example, 266995 + ... + 292216.

It is an arithmetic number, because the mean of its divisors is an integer number (1763195436).

Almost surely, 2^7052209921 is an apocalyptic number.

It is an amenable number.

7052209921 is a deficient number, since it is larger than the sum of its proper divisors (571823).

7052209921 is a wasteful number, since it uses less digits than its factorization.

7052209921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571822.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 7052209921 is about 83977.4369756544. The cubic root of 7052209921 is about 1917.6753115512.

The spelling of 7052209921 in words is "seven billion, fifty-two million, two hundred nine thousand, nine hundred twenty-one".