100001222111 has 4 divisors (see below), whose sum is σ = 114287110992. Its totient is φ = 85715333232.

The previous prime is 100001222039. The next prime is 100001222141. The reversal of 100001222111 is 111222100001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111222100001 = 59 ⋅1885120339.

It is a cyclic number.

It is not a de Polignac number, because 100001222111 - 2²⁶ = 99934113247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001222092 and 100001222101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001222141) 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, 7142944430 + ... + 7142944443.

It is an arithmetic number, because the mean of its divisors is an integer number (28571777748).

Almost surely, 2^100001222111 is an apocalyptic number.

100001222111 is a deficient number, since it is larger than the sum of its proper divisors (14285888881).

100001222111 is an equidigital number, since it uses as much as digits as its factorization.

100001222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14285888880.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100001222111 its reverse (111222100001), we get a palindrome (211223322112).

The spelling of 100001222111 in words is "one hundred billion, one million, two hundred twenty-two thousand, one hundred eleven".