3221000012381 has 2 divisors, whose sum is σ = 3221000012382. Its totient is φ = 3221000012380.

The previous prime is 3221000012369. The next prime is 3221000012387. The reversal of 3221000012381 is 1832100001223.

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., 3126916719481 + 94083292900 = 1768309^2 + 306730^2 .

It is an emirp because it is prime and its reverse (1832100001223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3221000012381 - 2³⁴ = 3203820143197 is a prime.

It is a super-2 number, since 2×3221000012381² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3221000012387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610500006190 + 1610500006191.

It is an arithmetic number, because the mean of its divisors is an integer number (1610500006191).

Almost surely, 2^{3221000012381} is an apocalyptic number.

It is an amenable number.

3221000012381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221000012381 is an equidigital number, since it uses as much as digits as its factorization.

3221000012381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 3221000012381 in words is "three trillion, two hundred twenty-one billion, twelve thousand, three hundred eighty-one".