20111226038797 has 2 divisors, whose sum is σ = 20111226038798. Its totient is φ = 20111226038796.

The previous prime is 20111226038689. The next prime is 20111226038861. The reversal of 20111226038797 is 79783062211102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14762339468041 + 5348886570756 = 3842179^2 + 2312766^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111226038797 - 2³¹ = 20109078555149 is a prime.

It is a super-2 number, since 2×20111226038797² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20111226038797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111226068797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055613019398 + 10055613019399.

It is an arithmetic number, because the mean of its divisors is an integer number (10055613019399).

Almost surely, 2^{20111226038797} is an apocalyptic number.

It is an amenable number.

20111226038797 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111226038797 is an equidigital number, since it uses as much as digits as its factorization.

20111226038797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

Adding to 20111226038797 its reverse (79783062211102), we get a palindrome (99894288249899).

The spelling of 20111226038797 in words is "twenty trillion, one hundred eleven billion, two hundred twenty-six million, thirty-eight thousand, seven hundred ninety-seven".