11111220037 has 2 divisors, whose sum is σ = 11111220038. Its totient is φ = 11111220036.

The previous prime is 11111220019. The next prime is 11111220049. The reversal of 11111220037 is 73002211111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6233734116 + 4877485921 = 78954^2 + 69839^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111220037 - 2¹⁹ = 11110695749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111219996 and 11111220023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111220067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555610018 + 5555610019.

It is an arithmetic number, because the mean of its divisors is an integer number (5555610019).

Almost surely, 2^11111220037 is an apocalyptic number.

It is an amenable number.

11111220037 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111220037 is an equidigital number, since it uses as much as digits as its factorization.

11111220037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 19.

Adding to 11111220037 its reverse (73002211111), we get a palindrome (84113431148).

The spelling of 11111220037 in words is "eleven billion, one hundred eleven million, two hundred twenty thousand, thirty-seven".