1000121222111 has 16 divisors (see below), whose sum is σ = 1108889913600. Its totient is φ = 894439553280.

The previous prime is 1000121222071. The next prime is 1000121222129. The reversal of 1000121222111 is 1112221210001.

It is a cyclic number.

It is not a de Polignac number, because 1000121222111 - 2³⁴ = 982941352927 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 (1000121225111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2628161 + ... + 2984538.

It is an arithmetic number, because the mean of its divisors is an integer number (69305619600).

Almost surely, 2^{1000121222111} is an apocalyptic number.

1000121222111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1000121222111 is a deficient number, since it is larger than the sum of its proper divisors (108768691489).

1000121222111 is a wasteful number, since it uses less digits than its factorization.

1000121222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5612974.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1000121222111 its reverse (1112221210001), we get a palindrome (2112342432112).

The spelling of 1000121222111 in words is "one trillion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".