21234201367 has 4 divisors (see below), whose sum is σ = 21237819120. Its totient is φ = 21230583616.

The previous prime is 21234201349. The next prime is 21234201413. The reversal of 21234201367 is 76310243212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21234201367 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 (21234208367) 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, 1800058 + ... + 1811815.

It is an arithmetic number, because the mean of its divisors is an integer number (5309454780).

Almost surely, 2^21234201367 is an apocalyptic number.

21234201367 is a deficient number, since it is larger than the sum of its proper divisors (3617753).

21234201367 is an equidigital number, since it uses as much as digits as its factorization.

21234201367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617752.

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 21234201367 its reverse (76310243212), we get a palindrome (97544444579).

The spelling of 21234201367 in words is "twenty-one billion, two hundred thirty-four million, two hundred one thousand, three hundred sixty-seven".