11211201109 has 2 divisors, whose sum is σ = 11211201110. Its totient is φ = 11211201108.

The previous prime is 11211201103. The next prime is 11211201149. The reversal of 11211201109 is 90110211211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10327030884 + 884170225 = 101622^2 + 29735^2 .

It is an emirp because it is prime and its reverse (90110211211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11211201109 - 2²³ = 11202812501 is a prime.

It is a super-3 number, since 3×11211201109³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211201103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605600554 + 5605600555.

It is an arithmetic number, because the mean of its divisors is an integer number (5605600555).

Almost surely, 2^11211201109 is an apocalyptic number.

It is an amenable number.

11211201109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211201109 is an equidigital number, since it uses as much as digits as its factorization.

11211201109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 11211201109 in words is "eleven billion, two hundred eleven million, two hundred one thousand, one hundred nine".