2123441021 has 8 divisors (see below), whose sum is σ = 2299560480. Its totient is φ = 1949146992.

The previous prime is 2123441017. The next prime is 2123441039. The reversal of 2123441021 is 1201443212.

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

It is not a de Polignac number, because 2123441021 - 2² = 2123441017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123440984 and 2123441002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123441071) 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, 453935 + ... + 458588.

It is an arithmetic number, because the mean of its divisors is an integer number (287445060).

Almost surely, 2^2123441021 is an apocalyptic number.

It is an amenable number.

2123441021 is a deficient number, since it is larger than the sum of its proper divisors (176119459).

2123441021 is a wasteful number, since it uses less digits than its factorization.

2123441021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912715.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2123441021 is about 46080.8096825566. The cubic root of 2123441021 is about 1285.3263204521.

Adding to 2123441021 its reverse (1201443212), we get a palindrome (3324884233).

The spelling of 2123441021 in words is "two billion, one hundred twenty-three million, four hundred forty-one thousand, twenty-one".