3222121381 has 2 divisors, whose sum is σ = 3222121382. Its totient is φ = 3222121380.

The previous prime is 3222121349. The next prime is 3222121391. The reversal of 3222121381 is 1831212223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3064618881 + 157502500 = 55359^2 + 12550^2 .

It is an emirp because it is prime and its reverse (1831212223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3222121381 - 2⁵ = 3222121349 is a prime.

It is a super-2 number, since 2×3222121381² = 20764132387794694322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3222121391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611060690 + 1611060691.

It is an arithmetic number, because the mean of its divisors is an integer number (1611060691).

Almost surely, 2^3222121381 is an apocalyptic number.

It is an amenable number.

3222121381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3222121381 is an equidigital number, since it uses as much as digits as its factorization.

3222121381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 3222121381 is about 56763.7329727353. The cubic root of 3222121381 is about 1477.0004657282. Note that the first 3 decimals are identical.

The spelling of 3222121381 in words is "three billion, two hundred twenty-two million, one hundred twenty-one thousand, three hundred eighty-one".