2124222421 has 8 divisors (see below), whose sum is σ = 2205412920. Its totient is φ = 2043561408.

The previous prime is 2124222413. The next prime is 2124222467. The reversal of 2124222421 is 1242224212.

It can be written as a sum of positive squares in 4 ways, for example, as 16402500 + 2107819921 = 4050^2 + 45911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2124222421 - 2³ = 2124222413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2124222392 and 2124222401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2124222491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124186 + ... + 140251.

It is an arithmetic number, because the mean of its divisors is an integer number (275676615).

Almost surely, 2^2124222421 is an apocalyptic number.

It is an amenable number.

2124222421 is a deficient number, since it is larger than the sum of its proper divisors (81190499).

2124222421 is a wasteful number, since it uses less digits than its factorization.

2124222421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264743.

The product of its digits is 1024, while the sum is 22.

The square root of 2124222421 is about 46089.2874863563. The cubic root of 2124222421 is about 1285.4839625066.

Adding to 2124222421 its reverse (1242224212), we get a palindrome (3366446633).

It can be divided in two parts, 2 and 124222421, that multiplied together give a palindrome (248444842).

The spelling of 2124222421 in words is "two billion, one hundred twenty-four million, two hundred twenty-two thousand, four hundred twenty-one".