2125443021 has 8 divisors (see below), whose sum is σ = 3051918240. Its totient is φ = 1307964912.

The previous prime is 2125443017. The next prime is 2125443029. The reversal of 2125443021 is 1203445212.

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

It is not a de Polignac number, because 2125443021 - 2² = 2125443017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2125442982 and 2125443000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125443029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27249231 + ... + 27249308.

It is an arithmetic number, because the mean of its divisors is an integer number (381489780).

Almost surely, 2^2125443021 is an apocalyptic number.

It is an amenable number.

2125443021 is a deficient number, since it is larger than the sum of its proper divisors (926475219).

2125443021 is a wasteful number, since it uses less digits than its factorization.

2125443021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54498555.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2125443021 is about 46102.5272734587. The cubic root of 2125443021 is about 1285.7301327870.

Adding to 2125443021 its reverse (1203445212), we get a palindrome (3328888233).

The spelling of 2125443021 in words is "two billion, one hundred twenty-five million, four hundred forty-three thousand, twenty-one".