7040020221 has 12 divisors (see below), whose sum is σ = 10951142748. Its totient is φ = 4332320064.

The previous prime is 7040020219. The next prime is 7040020223. The reversal of 7040020221 is 1220200407.

It is an interprime number because it is at equal distance from previous prime (7040020219) and next prime (7040020223).

It can be written as a sum of positive squares in 2 ways, for example, as 4867155225 + 2172864996 = 69765^2 + 46614^2 .

It is not a de Polignac number, because 7040020221 - 2¹ = 7040020219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7040020194 and 7040020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7040020223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30085440 + ... + 30085673.

It is an arithmetic number, because the mean of its divisors is an integer number (912595229).

Almost surely, 2^7040020221 is an apocalyptic number.

It is an amenable number.

7040020221 is a deficient number, since it is larger than the sum of its proper divisors (3911122527).

7040020221 is a wasteful number, since it uses less digits than its factorization.

7040020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60171132 (or 60171129 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 7040020221 is about 83904.8283533195. The cubic root of 7040020221 is about 1916.5697778101.

Adding to 7040020221 its reverse (1220200407), we get a palindrome (8260220628).

The spelling of 7040020221 in words is "seven billion, forty million, twenty thousand, two hundred twenty-one".