2212285721 has 2 divisors, whose sum is σ = 2212285722. Its totient is φ = 2212285720.

The previous prime is 2212285717. The next prime is 2212285741. The reversal of 2212285721 is 1275822122.

2212285721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1871514121 + 340771600 = 43261^2 + 18460^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212285721 - 2² = 2212285717 is a prime.

It is a super-2 number, since 2×2212285721² = 9788416222680979682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2212285741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106142860 + 1106142861.

It is an arithmetic number, because the mean of its divisors is an integer number (1106142861).

Almost surely, 2^2212285721 is an apocalyptic number.

It is an amenable number.

2212285721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212285721 is an equidigital number, since it uses as much as digits as its factorization.

2212285721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 32.

The square root of 2212285721 is about 47034.9414903431. The cubic root of 2212285721 is about 1303.0079698309.

The spelling of 2212285721 in words is "two billion, two hundred twelve million, two hundred eighty-five thousand, seven hundred twenty-one".