21301221101 has 2 divisors, whose sum is σ = 21301221102. Its totient is φ = 21301221100.

The previous prime is 21301221089. The next prime is 21301221113. The reversal of 21301221101 is 10112210312.

It is a balanced prime because it is at equal distance from previous prime (21301221089) and next prime (21301221113).

It can be written as a sum of positive squares in only one way, i.e., 16170937225 + 5130283876 = 127165^2 + 71626^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301221101 - 2⁶ = 21301221037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21301221001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650610550 + 10650610551.

It is an arithmetic number, because the mean of its divisors is an integer number (10650610551).

Almost surely, 2^21301221101 is an apocalyptic number.

It is an amenable number.

21301221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301221101 is an equidigital number, since it uses as much as digits as its factorization.

21301221101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21301221101 its reverse (10112210312), we get a palindrome (31413431413).

The spelling of 21301221101 in words is "twenty-one billion, three hundred one million, two hundred twenty-one thousand, one hundred one".