7005621020221 has 4 divisors (see below), whose sum is σ = 7044758568000. Its totient is φ = 6966483472444.

The previous prime is 7005621020191. The next prime is 7005621020263. The reversal of 7005621020221 is 1220201265007.

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.

It is a cyclic number.

It is not a de Polignac number, because 7005621020221 - 2¹³ = 7005621012029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7005621020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7005621020291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19568773621 + ... + 19568773978.

It is an arithmetic number, because the mean of its divisors is an integer number (1761189642000).

Almost surely, 2^{7005621020221} is an apocalyptic number.

It is an amenable number.

7005621020221 is a deficient number, since it is larger than the sum of its proper divisors (39137547779).

7005621020221 is a wasteful number, since it uses less digits than its factorization.

7005621020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39137547778.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 7005621020221 its reverse (1220201265007), we get a palindrome (8225822285228).

The spelling of 7005621020221 in words is "seven trillion, five billion, six hundred twenty-one million, twenty thousand, two hundred twenty-one".