3001221000 has 192 divisors, whose sum is σ = 10678636800. Its totient is φ = 758160000.

The previous prime is 3001220993. The next prime is 3001221001. The reversal of 3001221000 is 1221003.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (3001221001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 162225 + ... + 179775.

It is an arithmetic number, because the mean of its divisors is an integer number (55617900).

Almost surely, 2^3001221000 is an apocalyptic number.

3001221000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3001221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5339318400).

3001221000 is an abundant number, since it is smaller than the sum of its proper divisors (7677415800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3001221000 is a wasteful number, since it uses less digits than its factorization.

3001221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17597 (or 17580 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 3001221000 is about 54783.4007706714. The cubic root of 3001221000 is about 1442.4452089599.

Adding to 3001221000 its reverse (1221003), we get a palindrome (3002442003).

The spelling of 3001221000 in words is "three billion, one million, two hundred twenty-one thousand".