21234201167 has 4 divisors (see below), whose sum is σ = 21490035000. Its totient is φ = 20978367336.

The previous prime is 21234201139. The next prime is 21234201187. The reversal of 21234201167 is 76110243212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21234201167 - 2²⁴ = 21217423951 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 (21234201137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127916792 + ... + 127916957.

It is an arithmetic number, because the mean of its divisors is an integer number (5372508750).

Almost surely, 2^21234201167 is an apocalyptic number.

21234201167 is a deficient number, since it is larger than the sum of its proper divisors (255833833).

21234201167 is an equidigital number, since it uses as much as digits as its factorization.

21234201167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255833832.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 21234201167 its reverse (76110243212), we get a palindrome (97344444379).

The spelling of 21234201167 in words is "twenty-one billion, two hundred thirty-four million, two hundred one thousand, one hundred sixty-seven".