2143422121 has 4 divisors (see below), whose sum is σ = 2156257152. Its totient is φ = 2130587092.

The previous prime is 2143422109. The next prime is 2143422137. The reversal of 2143422121 is 1212243412.

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 2143422121 - 2¹⁷ = 2143291049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2143422092 and 2143422101.

It is not an unprimeable number, because it can be changed into a prime (2143422191) 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, 6417265 + ... + 6417598.

It is an arithmetic number, because the mean of its divisors is an integer number (539064288).

Almost surely, 2^2143422121 is an apocalyptic number.

It is an amenable number.

2143422121 is a deficient number, since it is larger than the sum of its proper divisors (12835031).

2143422121 is a wasteful number, since it uses less digits than its factorization.

2143422121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12835030.

The product of its digits is 768, while the sum is 22.

The square root of 2143422121 is about 46297.1070478491. The cubic root of 2143422121 is about 1289.3452842166.

Adding to 2143422121 its reverse (1212243412), we get a palindrome (3355665533).

The spelling of 2143422121 in words is "two billion, one hundred forty-three million, four hundred twenty-two thousand, one hundred twenty-one".