3331123020221 has 2 divisors, whose sum is σ = 3331123020222. Its totient is φ = 3331123020220.

The previous prime is 3331123020217. The next prime is 3331123020241. The reversal of 3331123020221 is 1220203211333.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2934160017721 + 396963002500 = 1712939^2 + 630050^2 .

It is a cyclic number.

It is not a de Polignac number, because 3331123020221 - 2² = 3331123020217 is a prime.

It is a super-2 number, since 2×3331123020221² (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 (3331123020241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1665561510110 + 1665561510111.

It is an arithmetic number, because the mean of its divisors is an integer number (1665561510111).

Almost surely, 2^{3331123020221} is an apocalyptic number.

It is an amenable number.

3331123020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3331123020221 is an equidigital number, since it uses as much as digits as its factorization.

3331123020221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 3331123020221 its reverse (1220203211333), we get a palindrome (4551326231554).

The spelling of 3331123020221 in words is "three trillion, three hundred thirty-one billion, one hundred twenty-three million, twenty thousand, two hundred twenty-one".