2211121331 has 2 divisors, whose sum is σ = 2211121332. Its totient is φ = 2211121330.

The previous prime is 2211121321. The next prime is 2211121343. The reversal of 2211121331 is 1331211122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211121331 is a prime.

It is a super-2 number, since 2×2211121331² = 9778115080806423122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2211121301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105560665 + 1105560666.

It is an arithmetic number, because the mean of its divisors is an integer number (1105560666).

Almost surely, 2^2211121331 is an apocalyptic number.

2211121331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211121331 is an equidigital number, since it uses as much as digits as its factorization.

2211121331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 17.

The square root of 2211121331 is about 47022.5619357346. The cubic root of 2211121331 is about 1302.7793261108.

Adding to 2211121331 its reverse (1331211122), we get a palindrome (3542332453).

The spelling of 2211121331 in words is "two billion, two hundred eleven million, one hundred twenty-one thousand, three hundred thirty-one".