21100001000237 has 2 divisors, whose sum is σ = 21100001000238. Its totient is φ = 21100001000236.

The previous prime is 21100001000149. The next prime is 21100001000261. The reversal of 21100001000237 is 73200010000112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19606927176841 + 1493073823396 = 4427971^2 + 1221914^2 .

It is a cyclic number.

It is not a de Polignac number, because 21100001000237 - 2⁸ = 21100000999981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100000000237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550000500118 + 10550000500119.

It is an arithmetic number, because the mean of its divisors is an integer number (10550000500119).

Almost surely, 2^{21100001000237} is an apocalyptic number.

It is an amenable number.

21100001000237 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100001000237 is an equidigital number, since it uses as much as digits as its factorization.

21100001000237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

Adding to 21100001000237 its reverse (73200010000112), we get a palindrome (94300011000349).

The spelling of 21100001000237 in words is "twenty-one trillion, one hundred billion, one million, two hundred thirty-seven", and thus it is an aban number.