2422222421 has 2 divisors, whose sum is σ = 2422222422. Its totient is φ = 2422222420.

The previous prime is 2422222399. The next prime is 2422222457. The reversal of 2422222421 is 1242222242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1491118225 + 931104196 = 38615^2 + 30514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2422222421 - 2¹⁰ = 2422221397 is a prime.

It is a super-2 number, since 2×2422222421² = 11734322913590202482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2422222021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1211111210 + 1211111211.

It is an arithmetic number, because the mean of its divisors is an integer number (1211111211).

Almost surely, 2^2422222421 is an apocalyptic number.

It is an amenable number.

2422222421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2422222421 is an equidigital number, since it uses as much as digits as its factorization.

2422222421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2048, while the sum is 23.

The square root of 2422222421 is about 49216.0788868841. The cubic root of 2422222421 is about 1342.9855502482.

Adding to 2422222421 its reverse (1242222242), we get a palindrome (3664444663).

The spelling of 2422222421 in words is "two billion, four hundred twenty-two million, two hundred twenty-two thousand, four hundred twenty-one".