2143434102221 has 4 divisors (see below), whose sum is σ = 2144157505152. Its totient is φ = 2142710699292.

The previous prime is 2143434102209. The next prime is 2143434102289. The reversal of 2143434102221 is 1222014343412.

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 2143434102221 - 2⁶ = 2143434102157 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 (2143434102421) 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, 361697021 + ... + 361702946.

It is an arithmetic number, because the mean of its divisors is an integer number (536039376288).

Almost surely, 2^{2143434102221} is an apocalyptic number.

It is an amenable number.

2143434102221 is a deficient number, since it is larger than the sum of its proper divisors (723402931).

2143434102221 is an equidigital number, since it uses as much as digits as its factorization.

2143434102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723402930.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 2143434102221 its reverse (1222014343412), we get a palindrome (3365448445633).

The spelling of 2143434102221 in words is "two trillion, one hundred forty-three billion, four hundred thirty-four million, one hundred two thousand, two hundred twenty-one".