3216146021 has 4 divisors (see below), whose sum is σ = 3508522944. Its totient is φ = 2923769100.

The previous prime is 3216146009. The next prime is 3216146027. The reversal of 3216146021 is 1206416123.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1206416123 = 11 ⋅109674193.

It is a cyclic number.

It is not a de Polignac number, because 3216146021 - 2¹⁸ = 3215883877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3216146027) 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, 146188445 + ... + 146188466.

It is an arithmetic number, because the mean of its divisors is an integer number (877130736).

Almost surely, 2^3216146021 is an apocalyptic number.

It is an amenable number.

3216146021 is a deficient number, since it is larger than the sum of its proper divisors (292376923).

3216146021 is a wasteful number, since it uses less digits than its factorization.

3216146021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292376922.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 3216146021 is about 56711.0749413199. The cubic root of 3216146021 is about 1476.0868780919.

The spelling of 3216146021 in words is "three billion, two hundred sixteen million, one hundred forty-six thousand, twenty-one".