21110331303101 has 2 divisors, whose sum is σ = 21110331303102. Its totient is φ = 21110331303100.

The previous prime is 21110331303059. The next prime is 21110331303179. The reversal of 21110331303101 is 10130313301112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21100233063001 + 10098240100 = 4593499^2 + 100490^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110331303101 - 2³⁸ = 20835453396157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110331303181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555165651550 + 10555165651551.

It is an arithmetic number, because the mean of its divisors is an integer number (10555165651551).

Almost surely, 2^{21110331303101} is an apocalyptic number.

It is an amenable number.

21110331303101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110331303101 is an equidigital number, since it uses as much as digits as its factorization.

21110331303101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 21110331303101 its reverse (10130313301112), we get a palindrome (31240644604213).

The spelling of 21110331303101 in words is "twenty-one trillion, one hundred ten billion, three hundred thirty-one million, three hundred three thousand, one hundred one".