21221110103101 has 2 divisors, whose sum is σ = 21221110103102. Its totient is φ = 21221110103100.

The previous prime is 21221110103077. The next prime is 21221110103107. The reversal of 21221110103101 is 10130101112212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17880220707001 + 3340889396100 = 4228501^2 + 1827810^2 .

It is a cyclic number.

It is not a de Polignac number, because 21221110103101 - 2⁹ = 21221110102589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221110103107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610555051550 + 10610555051551.

It is an arithmetic number, because the mean of its divisors is an integer number (10610555051551).

Almost surely, 2^{21221110103101} is an apocalyptic number.

It is an amenable number.

21221110103101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221110103101 is an equidigital number, since it uses as much as digits as its factorization.

21221110103101 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 16.

Adding to 21221110103101 its reverse (10130101112212), we get a palindrome (31351211215313).

The spelling of 21221110103101 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred ten million, one hundred three thousand, one hundred one".