2124022021 has 24 divisors (see below), whose sum is σ = 2375460864. Its totient is φ = 1897500000.

The previous prime is 2124022001. The next prime is 2124022039. The reversal of 2124022021 is 1202204212.

It is a de Polignac number, because none of the positive numbers 2^k-2124022021 is a prime.

It is a super-2 number, since 2×2124022021² = 9022939091385848882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2124021986 and 2124022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2124022001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1844796 + ... + 1845946.

It is an arithmetic number, because the mean of its divisors is an integer number (98977536).

Almost surely, 2^2124022021 is an apocalyptic number.

It is an amenable number.

2124022021 is a deficient number, since it is larger than the sum of its proper divisors (251438843).

2124022021 is a wasteful number, since it uses less digits than its factorization.

2124022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425 (or 1414 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2124022021 is about 46087.1133940931. The cubic root of 2124022021 is about 1285.4435368768.

Adding to 2124022021 its reverse (1202204212), we get a palindrome (3326226233).

It can be divided in two parts, 21 and 24022021, that added together give a palindrome (24022042).

The spelling of 2124022021 in words is "two billion, one hundred twenty-four million, twenty-two thousand, twenty-one".