2121125043 has 4 divisors (see below), whose sum is σ = 2828166728. Its totient is φ = 1414083360.

The previous prime is 2121125033. The next prime is 2121125051. The reversal of 2121125043 is 3405211212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2121125043 - 2⁹ = 2121124531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121125033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353520838 + ... + 353520843.

It is an arithmetic number, because the mean of its divisors is an integer number (707041682).

Almost surely, 2^2121125043 is an apocalyptic number.

2121125043 is a deficient number, since it is larger than the sum of its proper divisors (707041685).

2121125043 is an equidigital number, since it uses as much as digits as its factorization.

2121125043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707041684.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2121125043 is about 46055.6732987370. The cubic root of 2121125043 is about 1284.8588605853.

Adding to 2121125043 its reverse (3405211212), we get a palindrome (5526336255).

The spelling of 2121125043 in words is "two billion, one hundred twenty-one million, one hundred twenty-five thousand, forty-three".