21202001167 has 2 divisors, whose sum is σ = 21202001168. Its totient is φ = 21202001166.

The previous prime is 21202001131. The next prime is 21202001189. The reversal of 21202001167 is 76110020212.

It is a happy number.

It is an a-pointer prime, because the next prime (21202001189) can be obtained adding 21202001167 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202001167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202001267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601000583 + 10601000584.

It is an arithmetic number, because the mean of its divisors is an integer number (10601000584).

Almost surely, 2^21202001167 is an apocalyptic number.

21202001167 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202001167 is an equidigital number, since it uses as much as digits as its factorization.

21202001167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 21202001167 its reverse (76110020212), we get a palindrome (97312021379).

The spelling of 21202001167 in words is "twenty-one billion, two hundred two million, one thousand, one hundred sixty-seven".