111121222311 has 24 divisors (see below), whose sum is σ = 175110998400. Its totient is φ = 67342006800.

The previous prime is 111121222309. The next prime is 111121222321. The reversal of 111121222311 is 113222121111.

It is a happy number.

111121222311 is a `hidden beast` number, since 1 + 11 + 121 + 222 + 311 = 666.

It is not a de Polignac number, because 111121222311 - 2¹ = 111121222309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121222321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2463640 + ... + 2508338.

It is an arithmetic number, because the mean of its divisors is an integer number (7296291600).

Almost surely, 2^111121222311 is an apocalyptic number.

111121222311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111121222311 is a deficient number, since it is larger than the sum of its proper divisors (63989776089).

111121222311 is a wasteful number, since it uses less digits than its factorization.

111121222311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69827 (or 69824 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 111121222311 its reverse (113222121111), we get a palindrome (224343343422).

The spelling of 111121222311 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, three hundred eleven".