21212000167 has 2 divisors, whose sum is σ = 21212000168. Its totient is φ = 21212000166.

The previous prime is 21212000119. The next prime is 21212000203. The reversal of 21212000167 is 76100021212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212000167 - 2³¹ = 19064516519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212000107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606000083 + 10606000084.

It is an arithmetic number, because the mean of its divisors is an integer number (10606000084).

Almost surely, 2^21212000167 is an apocalyptic number.

21212000167 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212000167 is an equidigital number, since it uses as much as digits as its factorization.

21212000167 is an evil number, because the sum of its binary digits is even.

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

Adding to 21212000167 its reverse (76100021212), we get a palindrome (97312021379).

The spelling of 21212000167 in words is "twenty-one billion, two hundred twelve million, one hundred sixty-seven", and thus it is an aban number.