2121848837 has 4 divisors (see below), whose sum is σ = 2125526796. Its totient is φ = 2118170880.

The previous prime is 2121848783. The next prime is 2121848867. The reversal of 2121848837 is 7388481212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1423251076 + 698597761 = 37726^2 + 26431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121848837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121848867) 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, 1838114 + ... + 1839267.

It is an arithmetic number, because the mean of its divisors is an integer number (531381699).

Almost surely, 2^2121848837 is an apocalyptic number.

It is an amenable number.

2121848837 is a deficient number, since it is larger than the sum of its proper divisors (3677959).

2121848837 is an equidigital number, since it uses as much as digits as its factorization.

2121848837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677958.

The product of its digits is 172032, while the sum is 44.

The square root of 2121848837 is about 46063.5304443765. The cubic root of 2121848837 is about 1285.0049886002.

The spelling of 2121848837 in words is "two billion, one hundred twenty-one million, eight hundred forty-eight thousand, eight hundred thirty-seven".