2143121213 has 4 divisors (see below), whose sum is σ = 2143262400. Its totient is φ = 2142980028.

The previous prime is 2143121191. The next prime is 2143121221. The reversal of 2143121213 is 3121213412.

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 2143121213 - 2¹² = 2143117117 is a prime.

It is a super-2 number, since 2×2143121213² = 9185937067221182738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143121263) 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, 44645 + ... + 79242.

It is an arithmetic number, because the mean of its divisors is an integer number (535815600).

Almost surely, 2^2143121213 is an apocalyptic number.

It is an amenable number.

2143121213 is a deficient number, since it is larger than the sum of its proper divisors (141187).

2143121213 is a wasteful number, since it uses less digits than its factorization.

2143121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141186.

The product of its digits is 288, while the sum is 20.

The square root of 2143121213 is about 46293.8571842961. The cubic root of 2143121213 is about 1289.2849457414.

Adding to 2143121213 its reverse (3121213412), we get a palindrome (5264334625).

The spelling of 2143121213 in words is "two billion, one hundred forty-three million, one hundred twenty-one thousand, two hundred thirteen".