3311111021 has 2 divisors, whose sum is σ = 3311111022. Its totient is φ = 3311111020.

The previous prime is 3311110993. The next prime is 3311111039. The reversal of 3311111021 is 1201111133.

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., 3294186025 + 16924996 = 57395^2 + 4114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3311111021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3311110987 and 3311111005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3311111081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1655555510 + 1655555511.

It is an arithmetic number, because the mean of its divisors is an integer number (1655555511).

Almost surely, 2^3311111021 is an apocalyptic number.

It is an amenable number.

3311111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3311111021 is an equidigital number, since it uses as much as digits as its factorization.

3311111021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 3311111021 is about 57542.2542224407. The cubic root of 3311111021 is about 1490.4746053518.

Adding to 3311111021 its reverse (1201111133), we get a palindrome (4512222154).

The spelling of 3311111021 in words is "three billion, three hundred eleven million, one hundred eleven thousand, twenty-one".