2211311021 has 2 divisors, whose sum is σ = 2211311022. Its totient is φ = 2211311020.

The previous prime is 2211311009. The next prime is 2211311033. The reversal of 2211311021 is 1201131122.

It is a balanced prime because it is at equal distance from previous prime (2211311009) and next prime (2211311033).

It can be written as a sum of positive squares in only one way, i.e., 2210034121 + 1276900 = 47011^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211311021 - 2¹⁴ = 2211294637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2211310987 and 2211311005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211311321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105655510 + 1105655511.

It is an arithmetic number, because the mean of its divisors is an integer number (1105655511).

Almost surely, 2^2211311021 is an apocalyptic number.

It is an amenable number.

2211311021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211311021 is an equidigital number, since it uses as much as digits as its factorization.

2211311021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2211311021 is about 47024.5789029524. The cubic root of 2211311021 is about 1302.8165797793.

Adding to 2211311021 its reverse (1201131122), we get a palindrome (3412442143).

The spelling of 2211311021 in words is "two billion, two hundred eleven million, three hundred eleven thousand, twenty-one".