21232121167 has 2 divisors, whose sum is σ = 21232121168. Its totient is φ = 21232121166.

The previous prime is 21232121069. The next prime is 21232121201. The reversal of 21232121167 is 76112123212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21232121167 - 2²⁷ = 21097903439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21232101167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616060583 + 10616060584.

It is an arithmetic number, because the mean of its divisors is an integer number (10616060584).

Almost surely, 2^21232121167 is an apocalyptic number.

21232121167 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232121167 is an equidigital number, since it uses as much as digits as its factorization.

21232121167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

Adding to 21232121167 its reverse (76112123212), we get a palindrome (97344244379).

The spelling of 21232121167 in words is "twenty-one billion, two hundred thirty-two million, one hundred twenty-one thousand, one hundred sixty-seven".