211134203143421 has 4 divisors (see below), whose sum is σ = 211161541517472. Its totient is φ = 211106864769372.

The previous prime is 211134203143321. The next prime is 211134203143433. The reversal of 211134203143421 is 124341302431112.

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 211134203143421 - 2³⁴ = 211117023274237 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 (211134203143471) 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, 13669175441 + ... + 13669190886.

It is an arithmetic number, because the mean of its divisors is an integer number (52790385379368).

Almost surely, 2^{211134203143421} is an apocalyptic number.

It is an amenable number.

211134203143421 is a deficient number, since it is larger than the sum of its proper divisors (27338374051).

211134203143421 is an equidigital number, since it uses as much as digits as its factorization.

211134203143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27338374050.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 211134203143421 its reverse (124341302431112), we get a palindrome (335475505574533).

The spelling of 211134203143421 in words is "two hundred eleven trillion, one hundred thirty-four billion, two hundred three million, one hundred forty-three thousand, four hundred twenty-one".