122122210111 has 4 divisors (see below), whose sum is σ = 133224229224. Its totient is φ = 111020191000.

The previous prime is 122122210103. The next prime is 122122210139. The reversal of 122122210111 is 111012221221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111012221221 = 11 ⋅10092020111.

It is a cyclic number.

It is not a de Polignac number, because 122122210111 - 2³ = 122122210103 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 (122122210151) 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, 5551009540 + ... + 5551009561.

It is an arithmetic number, because the mean of its divisors is an integer number (33306057306).

Almost surely, 2^122122210111 is an apocalyptic number.

122122210111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122122210111 is a deficient number, since it is larger than the sum of its proper divisors (11102019113).

122122210111 is a wasteful number, since it uses less digits than its factorization.

122122210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11102019112.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 122122210111 its reverse (111012221221), we get a palindrome (233134431332).

It can be divided in two parts, 122122 and 210111, that added together give a palindrome (332233).

The spelling of 122122210111 in words is "one hundred twenty-two billion, one hundred twenty-two million, two hundred ten thousand, one hundred eleven".