2134231421 has 4 divisors (see below), whose sum is σ = 2439121632. Its totient is φ = 1829341212.

The previous prime is 2134231409. The next prime is 2134231441. The reversal of 2134231421 is 1241324312.

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 a de Polignac number, because none of the positive numbers 2^k-2134231421 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 (2134231441) 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, 152445095 + ... + 152445108.

It is an arithmetic number, because the mean of its divisors is an integer number (609780408).

Almost surely, 2^2134231421 is an apocalyptic number.

It is an amenable number.

2134231421 is a deficient number, since it is larger than the sum of its proper divisors (304890211).

2134231421 is an equidigital number, since it uses as much as digits as its factorization.

2134231421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304890210.

The product of its digits is 1152, while the sum is 23.

The square root of 2134231421 is about 46197.7425963650. The cubic root of 2134231421 is about 1287.4997987369.

Adding to 2134231421 its reverse (1241324312), we get a palindrome (3375555733).

The spelling of 2134231421 in words is "two billion, one hundred thirty-four million, two hundred thirty-one thousand, four hundred twenty-one".