2126332121 has 4 divisors (see below), whose sum is σ = 2126900352. Its totient is φ = 2125763892.

The previous prime is 2126332099. The next prime is 2126332147. The reversal of 2126332121 is 1212336212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2126332121 - 2⁶ = 2126332057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2126332181) 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, 278465 + ... + 285998.

It is an arithmetic number, because the mean of its divisors is an integer number (531725088).

Almost surely, 2^2126332121 is an apocalyptic number.

It is an amenable number.

2126332121 is a deficient number, since it is larger than the sum of its proper divisors (568231).

2126332121 is an equidigital number, since it uses as much as digits as its factorization.

2126332121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568230.

The product of its digits is 864, while the sum is 23.

The square root of 2126332121 is about 46112.1689036636. The cubic root of 2126332121 is about 1285.9093869143.

Adding to 2126332121 its reverse (1212336212), we get a palindrome (3338668333).

The spelling of 2126332121 in words is "two billion, one hundred twenty-six million, three hundred thirty-two thousand, one hundred twenty-one".