21100233113 has 2 divisors, whose sum is σ = 21100233114. Its totient is φ = 21100233112.

The previous prime is 21100233109. The next prime is 21100233137. The reversal of 21100233113 is 31133200112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20699152384 + 401080729 = 143872^2 + 20027^2 .

It is a cyclic number.

It is not a de Polignac number, because 21100233113 - 2² = 21100233109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21100233091 and 21100233100.

It is not a weakly prime, because it can be changed into another prime (21100233103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550116556 + 10550116557.

It is an arithmetic number, because the mean of its divisors is an integer number (10550116557).

Almost surely, 2^21100233113 is an apocalyptic number.

It is an amenable number.

21100233113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100233113 is an equidigital number, since it uses as much as digits as its factorization.

21100233113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21100233113 its reverse (31133200112), we get a palindrome (52233433225).

The spelling of 21100233113 in words is "twenty-one billion, one hundred million, two hundred thirty-three thousand, one hundred thirteen".