3220121473 has 2 divisors, whose sum is σ = 3220121474. Its totient is φ = 3220121472.

The previous prime is 3220121447. The next prime is 3220121479. The reversal of 3220121473 is 3741210223.

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., 2460953664 + 759167809 = 49608^2 + 27553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3220121473 is a prime.

It is not a weakly prime, because it can be changed into another prime (3220121479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610060736 + 1610060737.

It is an arithmetic number, because the mean of its divisors is an integer number (1610060737).

Almost surely, 2^3220121473 is an apocalyptic number.

It is an amenable number.

3220121473 is a deficient number, since it is larger than the sum of its proper divisors (1).

3220121473 is an equidigital number, since it uses as much as digits as its factorization.

3220121473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 3220121473 is about 56746.1141665225. The cubic root of 3220121473 is about 1476.6948206739.

Adding to 3220121473 its reverse (3741210223), we get a palindrome (6961331696).

The spelling of 3220121473 in words is "three billion, two hundred twenty million, one hundred twenty-one thousand, four hundred seventy-three".