2124502421 has 2 divisors, whose sum is σ = 2124502422. Its totient is φ = 2124502420.

The previous prime is 2124502417. The next prime is 2124502451. The reversal of 2124502421 is 1242054212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1596881521 + 527620900 = 39961^2 + 22970^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124502421 - 2² = 2124502417 is a prime.

It is a super-2 number, since 2×2124502421² = 9027021073669722482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2124502451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062251210 + 1062251211.

It is an arithmetic number, because the mean of its divisors is an integer number (1062251211).

Almost surely, 2^2124502421 is an apocalyptic number.

It is an amenable number.

2124502421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2124502421 is an equidigital number, since it uses as much as digits as its factorization.

2124502421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 2124502421 is about 46092.3249684804. The cubic root of 2124502421 is about 1285.5404411647.

Adding to 2124502421 its reverse (1242054212), we get a palindrome (3366556633).

The spelling of 2124502421 in words is "two billion, one hundred twenty-four million, five hundred two thousand, four hundred twenty-one".