2224120021 has 2 divisors, whose sum is σ = 2224120022. Its totient is φ = 2224120020.

The previous prime is 2224120009. The next prime is 2224120111. The reversal of 2224120021 is 1200214222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1237280625 + 986839396 = 35175^2 + 31414^2 .

It is a cyclic number.

It is not a de Polignac number, because 2224120021 - 2⁹ = 2224119509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2224119977 and 2224120004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2224120001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1112060010 + 1112060011.

It is an arithmetic number, because the mean of its divisors is an integer number (1112060011).

Almost surely, 2^2224120021 is an apocalyptic number.

It is an amenable number.

2224120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2224120021 is an equidigital number, since it uses as much as digits as its factorization.

2224120021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2224120021 is about 47160.5769790829. The cubic root of 2224120021 is about 1305.3272562414.

Adding to 2224120021 its reverse (1200214222), we get a palindrome (3424334243).

The spelling of 2224120021 in words is "two billion, two hundred twenty-four million, one hundred twenty thousand, twenty-one".