3221001020 has 24 divisors (see below), whose sum is σ = 6786147984. Its totient is φ = 1284201216.

The previous prime is 3221001013. The next prime is 3221001031. The reversal of 3221001020 is 201001223.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3221000992 and 3221001010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256157 + ... + 268436.

It is an arithmetic number, because the mean of its divisors is an integer number (282756166).

Almost surely, 2^3221001020 is an apocalyptic number.

It is an amenable number.

3221001020 is an abundant number, since it is smaller than the sum of its proper divisors (3565146964).

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

3221001020 is a wasteful number, since it uses less digits than its factorization.

3221001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524909 (or 524907 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 3221001020 is about 56753.8634808239. The cubic root of 3221001020 is about 1476.8292570375.

Adding to 3221001020 its reverse (201001223), we get a palindrome (3422002243).

The spelling of 3221001020 in words is "three billion, two hundred twenty-one million, one thousand, twenty".