11111221411 has 6 divisors (see below), whose sum is σ = 11324825540. Its totient is φ = 10901572968.

The previous prime is 11111221391. The next prime is 11111221423. The reversal of 11111221411 is 11412211111.

It is a happy number.

It is not a de Polignac number, because 11111221411 - 2²¹ = 11109124259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111222411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1974981 + ... + 1980598.

Almost surely, 2^11111221411 is an apocalyptic number.

11111221411 is a deficient number, since it is larger than the sum of its proper divisors (213604129).

11111221411 is an frugal number, since it uses more digits than its factorization.

11111221411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955685 (or 3955632 counting only the distinct ones).

The product of its digits is 16, while the sum is 16.

Adding to 11111221411 its reverse (11412211111), we get a palindrome (22523432522).

The spelling of 11111221411 in words is "eleven billion, one hundred eleven million, two hundred twenty-one thousand, four hundred eleven".