2124022421 has 2 divisors, whose sum is σ = 2124022422. Its totient is φ = 2124022420.

The previous prime is 2124022393. The next prime is 2124022441. The reversal of 2124022421 is 1242204212.

It is an a-pointer prime, because the next prime (2124022441) can be obtained adding 2124022421 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2059798225 + 64224196 = 45385^2 + 8014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124022421 - 2⁶ = 2124022357 is a prime.

It is a super-2 number, since 2×2124022421² = 9022942489821402482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2124022393 and 2124022402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2124022441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062011210 + 1062011211.

It is an arithmetic number, because the mean of its divisors is an integer number (1062011211).

Almost surely, 2^2124022421 is an apocalyptic number.

It is an amenable number.

2124022421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2124022421 is an equidigital number, since it uses as much as digits as its factorization.

2124022421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2124022421 is about 46087.1177337008. The cubic root of 2124022421 is about 1285.4436175692.

Adding to 2124022421 its reverse (1242204212), we get a palindrome (3366226633).

The spelling of 2124022421 in words is "two billion, one hundred twenty-four million, twenty-two thousand, four hundred twenty-one".