21110342101 has 2 divisors, whose sum is σ = 21110342102. Its totient is φ = 21110342100.

The previous prime is 21110342089. The next prime is 21110342107. The reversal of 21110342101 is 10124301112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16320318001 + 4790024100 = 127751^2 + 69210^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110342101 - 2⁹ = 21110341589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110342107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555171050 + 10555171051.

It is an arithmetic number, because the mean of its divisors is an integer number (10555171051).

Almost surely, 2^21110342101 is an apocalyptic number.

It is an amenable number.

21110342101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110342101 is an equidigital number, since it uses as much as digits as its factorization.

21110342101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21110342101 its reverse (10124301112), we get a palindrome (31234643213).

The spelling of 21110342101 in words is "twenty-one billion, one hundred ten million, three hundred forty-two thousand, one hundred one".