2124000421 has 2 divisors, whose sum is σ = 2124000422. Its totient is φ = 2124000420.

The previous prime is 2124000379. The next prime is 2124000457. The reversal of 2124000421 is 1240004212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2118760900 + 5239521 = 46030^2 + 2289^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124000421 - 2⁹ = 2123999909 is a prime.

It is a super-2 number, since 2×2124000421² = 9022755576816354482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2124000395 and 2124000404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2124000491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062000210 + 1062000211.

It is an arithmetic number, because the mean of its divisors is an integer number (1062000211).

Almost surely, 2^2124000421 is an apocalyptic number.

It is an amenable number.

2124000421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2124000421 is an equidigital number, since it uses as much as digits as its factorization.

2124000421 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 2124000421 is about 46086.8790546724. The cubic root of 2124000421 is about 1285.4391794715.

Adding to 2124000421 its reverse (1240004212), we get a palindrome (3364004633).

It can be divided in two parts, 2 and 124000421, that multiplied together give a palindrome (248000842).

The spelling of 2124000421 in words is "two billion, one hundred twenty-four million, four hundred twenty-one", and thus it is an aban number.