2043123121 has 16 divisors (see below), whose sum is σ = 2335132800. Its totient is φ = 1770893568.

The previous prime is 2043123119. The next prime is 2043123139. The reversal of 2043123121 is 1213213402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2043123121 - 2¹ = 2043123119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2043123151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86490 + ... + 107548.

It is an arithmetic number, because the mean of its divisors is an integer number (145945800).

Almost surely, 2^2043123121 is an apocalyptic number.

It is an amenable number.

2043123121 is a deficient number, since it is larger than the sum of its proper divisors (292009679).

2043123121 is a wasteful number, since it uses less digits than its factorization.

2043123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21528.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2043123121 is about 45200.9194707364. The cubic root of 2043123121 is about 1268.9120243920.

Adding to 2043123121 its reverse (1213213402), we get a palindrome (3256336523).

The spelling of 2043123121 in words is "two billion, forty-three million, one hundred twenty-three thousand, one hundred twenty-one".