7153321021 has 16 divisors (see below), whose sum is σ = 9206120448. Its totient is φ = 5394207600.

The previous prime is 7153321009. The next prime is 7153321033. The reversal of 7153321021 is 1201233517.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7153321009) and next prime (7153321033).

It is a cyclic number.

It is not a de Polignac number, because 7153321021 - 2²¹ = 7151223869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7153321321) 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 15 ways as a sum of consecutive naturals, for example, 1496005 + ... + 1500778.

It is an arithmetic number, because the mean of its divisors is an integer number (575382528).

Almost surely, 2^7153321021 is an apocalyptic number.

It is an amenable number.

7153321021 is a deficient number, since it is larger than the sum of its proper divisors (2052799427).

7153321021 is a wasteful number, since it uses less digits than its factorization.

7153321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996832.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 7153321021 is about 84577.3079555031. The cubic root of 7153321021 is about 1926.7967501391.

Adding to 7153321021 its reverse (1201233517), we get a palindrome (8354554538).

The spelling of 7153321021 in words is "seven billion, one hundred fifty-three million, three hundred twenty-one thousand, twenty-one".