122122220111 has 4 divisors (see below), whose sum is σ = 128549705400. Its totient is φ = 115694734824.

The previous prime is 122122220069. The next prime is 122122220113. The reversal of 122122220111 is 111022221221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111022221221 = 27107 ⋅4095703.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122122220111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122122220111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122220113) 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, 3213742616 + ... + 3213742653.

It is an arithmetic number, because the mean of its divisors is an integer number (32137426350).

Almost surely, 2^122122220111 is an apocalyptic number.

122122220111 is a deficient number, since it is larger than the sum of its proper divisors (6427485289).

122122220111 is an equidigital number, since it uses as much as digits as its factorization.

122122220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6427485288.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 122122220111 its reverse (111022221221), we get a palindrome (233144441332).

The spelling of 122122220111 in words is "one hundred twenty-two billion, one hundred twenty-two million, two hundred twenty thousand, one hundred eleven".