20011011001237 has 2 divisors, whose sum is σ = 20011011001238. Its totient is φ = 20011011001236.

The previous prime is 20011011001193. The next prime is 20011011001249. The reversal of 20011011001237 is 73210011011002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14845000232241 + 5166010768996 = 3852921^2 + 2272886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011011001237 is a prime.

It is a super-2 number, since 2×20011011001237² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011011007237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005505500618 + 10005505500619.

It is an arithmetic number, because the mean of its divisors is an integer number (10005505500619).

Almost surely, 2^{20011011001237} is an apocalyptic number.

It is an amenable number.

20011011001237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011011001237 is an equidigital number, since it uses as much as digits as its factorization.

20011011001237 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 19.

Adding to 20011011001237 its reverse (73210011011002), we get a palindrome (93221022012239).

The spelling of 20011011001237 in words is "twenty trillion, eleven billion, eleven million, one thousand, two hundred thirty-seven".