21232232101 has 2 divisors, whose sum is σ = 21232232102. Its totient is φ = 21232232100.

The previous prime is 21232232089. The next prime is 21232232111. The reversal of 21232232101 is 10123223212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19140999201 + 2091232900 = 138351^2 + 45730^2 .

It is a cyclic number.

It is not a de Polignac number, because 21232232101 - 2¹⁵ = 21232199333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21232232111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616116050 + 10616116051.

It is an arithmetic number, because the mean of its divisors is an integer number (10616116051).

Almost surely, 2^21232232101 is an apocalyptic number.

It is an amenable number.

21232232101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232232101 is an equidigital number, since it uses as much as digits as its factorization.

21232232101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21232232101 its reverse (10123223212), we get a palindrome (31355455313).

The spelling of 21232232101 in words is "twenty-one billion, two hundred thirty-two million, two hundred thirty-two thousand, one hundred one".