3219989021 has 2 divisors, whose sum is σ = 3219989022. Its totient is φ = 3219989020.

The previous prime is 3219988991. The next prime is 3219989027. The reversal of 3219989021 is 1209899123.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1784640025 + 1435348996 = 42245^2 + 37886^2 .

It is a cyclic number.

It is not a de Polignac number, because 3219989021 - 2¹⁸ = 3219726877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3219989027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609994510 + 1609994511.

It is an arithmetic number, because the mean of its divisors is an integer number (1609994511).

Almost surely, 2^3219989021 is an apocalyptic number.

It is an amenable number.

3219989021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3219989021 is an equidigital number, since it uses as much as digits as its factorization.

3219989021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 3219989021 is about 56744.9470966358. The cubic root of 3219989021 is about 1476.6745736257.

The spelling of 3219989021 in words is "three billion, two hundred nineteen million, nine hundred eighty-nine thousand, twenty-one".