21101111133301 has 2 divisors, whose sum is σ = 21101111133302. Its totient is φ = 21101111133300.

The previous prime is 21101111133229. The next prime is 21101111133383. The reversal of 21101111133301 is 10333111110112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18954930083076 + 2146181050225 = 4353726^2 + 1464985^2 .

It is a cyclic number.

It is not a de Polignac number, because 21101111133301 - 2¹⁹ = 21101110609013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101112133301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550555566650 + 10550555566651.

It is an arithmetic number, because the mean of its divisors is an integer number (10550555566651).

Almost surely, 2^{21101111133301} is an apocalyptic number.

It is an amenable number.

21101111133301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101111133301 is an equidigital number, since it uses as much as digits as its factorization.

21101111133301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 21101111133301 its reverse (10333111110112), we get a palindrome (31434222243413).

The spelling of 21101111133301 in words is "twenty-one trillion, one hundred one billion, one hundred eleven million, one hundred thirty-three thousand, three hundred one".