122231011111 has 4 divisors (see below), whose sum is σ = 133342921224. Its totient is φ = 111119101000.

The previous prime is 122231011073. The next prime is 122231011121. The reversal of 122231011111 is 111110132221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122231011111 - 2¹³ = 122231002919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122231011121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555955040 + ... + 5555955061.

It is an arithmetic number, because the mean of its divisors is an integer number (33335730306).

Almost surely, 2^122231011111 is an apocalyptic number.

122231011111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122231011111 is a deficient number, since it is larger than the sum of its proper divisors (11111910113).

122231011111 is a wasteful number, since it uses less digits than its factorization.

122231011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111910112.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 122231011111 its reverse (111110132221), we get a palindrome (233341143332).

The spelling of 122231011111 in words is "one hundred twenty-two billion, two hundred thirty-one million, eleven thousand, one hundred eleven".