1000122112111 has 4 divisors (see below), whose sum is σ = 1005647648824. Its totient is φ = 994596575400.

The previous prime is 1000122112021. The next prime is 1000122112133. The reversal of 1000122112111 is 1112112210001.

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 1000122112111 - 2¹⁵ = 1000122079343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000122112091 and 1000122112100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000122112711) 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, 2762768085 + ... + 2762768446.

It is an arithmetic number, because the mean of its divisors is an integer number (251411912206).

Almost surely, 2^{1000122112111} is an apocalyptic number.

1000122112111 is a deficient number, since it is larger than the sum of its proper divisors (5525536713).

1000122112111 is an equidigital number, since it uses as much as digits as its factorization.

1000122112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5525536712.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1000122112111 its reverse (1112112210001), we get a palindrome (2112234322112).

The spelling of 1000122112111 in words is "one trillion, one hundred twenty-two million, one hundred twelve thousand, one hundred eleven".