3213451021 has 8 divisors (see below), whose sum is σ = 3553605504. Its totient is φ = 2881300320.

The previous prime is 3213451009. The next prime is 3213451099. The reversal of 3213451021 is 1201543123.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3213451021 - 2¹³ = 3213442829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3213450983 and 3213451001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213451001) 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 in 7 ways as a sum of consecutive naturals, for example, 2000101 + ... + 2001706.

It is an arithmetic number, because the mean of its divisors is an integer number (444200688).

Almost surely, 2^3213451021 is an apocalyptic number.

It is an amenable number.

3213451021 is a deficient number, since it is larger than the sum of its proper divisors (340154483).

3213451021 is a wasteful number, since it uses less digits than its factorization.

3213451021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001891.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 3213451021 is about 56687.3091705719. The cubic root of 3213451021 is about 1475.6744625509.

Adding to 3213451021 its reverse (1201543123), we get a palindrome (4414994144).

The spelling of 3213451021 in words is "three billion, two hundred thirteen million, four hundred fifty-one thousand, twenty-one".