8068621221 has 16 divisors (see below), whose sum is σ = 12010173120. Its totient is φ = 5353583760.

The previous prime is 8068621213. The next prime is 8068621229. The reversal of 8068621221 is 1221268608.

8068621221 is a `hidden beast` number, since 8 + 0 + 6 + 8 + 621 + 2 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (8068621213) and next prime (8068621229).

It is not a de Polignac number, because 8068621221 - 2³ = 8068621213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8068621229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 702450 + ... + 713843.

It is an arithmetic number, because the mean of its divisors is an integer number (750635820).

Almost surely, 2^8068621221 is an apocalyptic number.

It is an amenable number.

8068621221 is a deficient number, since it is larger than the sum of its proper divisors (3941551899).

8068621221 is a wasteful number, since it uses less digits than its factorization.

8068621221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416513 (or 1416507 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 8068621221 is about 89825.5042902627. The cubic root of 8068621221 is about 2005.7021623055.

Adding to 8068621221 its reverse (1221268608), we get a palindrome (9289889829).

The spelling of 8068621221 in words is "eight billion, sixty-eight million, six hundred twenty-one thousand, two hundred twenty-one".