3315212921 has 2 divisors, whose sum is σ = 3315212922. Its totient is φ = 3315212920.

The previous prime is 3315212909. The next prime is 3315212947. The reversal of 3315212921 is 1292125133.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3293497321 + 21715600 = 57389^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 3315212921 - 2¹⁰ = 3315211897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3315212951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1657606460 + 1657606461.

It is an arithmetic number, because the mean of its divisors is an integer number (1657606461).

Almost surely, 2^3315212921 is an apocalyptic number.

It is an amenable number.

3315212921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3315212921 is an equidigital number, since it uses as much as digits as its factorization.

3315212921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 3315212921 is about 57577.8856940753. The cubic root of 3315212921 is about 1491.0898323697.

It can be divided in two parts, 3315212 and 921, that added together give a palindrome (3316133).

The spelling of 3315212921 in words is "three billion, three hundred fifteen million, two hundred twelve thousand, nine hundred twenty-one".