3111222110021 has 2 divisors, whose sum is σ = 3111222110022. Its totient is φ = 3111222110020.

The previous prime is 3111222109991. The next prime is 3111222110023. The reversal of 3111222110021 is 1200112221113.

It is a happy number.

3111222110021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2945805832225 + 165416277796 = 1716335^2 + 406714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3111222110021 is a prime.

Together with 3111222110023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3111222110023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555611055010 + 1555611055011.

It is an arithmetic number, because the mean of its divisors is an integer number (1555611055011).

Almost surely, 2^{3111222110021} is an apocalyptic number.

It is an amenable number.

3111222110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111222110021 is an equidigital number, since it uses as much as digits as its factorization.

3111222110021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 3111222110021 its reverse (1200112221113), we get a palindrome (4311334331134).

The spelling of 3111222110021 in words is "three trillion, one hundred eleven billion, two hundred twenty-two million, one hundred ten thousand, twenty-one".