11101221137 has 2 divisors, whose sum is σ = 11101221138. Its totient is φ = 11101221136.

The previous prime is 11101221097. The next prime is 11101221149. The reversal of 11101221137 is 73112210111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10984926481 + 116294656 = 104809^2 + 10784^2 .

It is an emirp because it is prime and its reverse (73112210111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11101221137 - 2¹⁴ = 11101204753 is a prime.

It is a super-2 number, since 2×11101221137² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11101221167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550610568 + 5550610569.

It is an arithmetic number, because the mean of its divisors is an integer number (5550610569).

Almost surely, 2^11101221137 is an apocalyptic number.

It is an amenable number.

11101221137 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101221137 is an equidigital number, since it uses as much as digits as its factorization.

11101221137 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 20.

Adding to 11101221137 its reverse (73112210111), we get a palindrome (84213431248).

The spelling of 11101221137 in words is "eleven billion, one hundred one million, two hundred twenty-one thousand, one hundred thirty-seven".