1000121112211 has 4 divisors (see below), whose sum is σ = 1077053505472. Its totient is φ = 923188718952.

The previous prime is 1000121112197. The next prime is 1000121112259. The reversal of 1000121112211 is 1122111210001.

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 1000121112211 - 2¹⁵ = 1000121079443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 76932393247 = 1000121112211 / (1 + 0 + 0 + 0 + 1 + 2 + 1 + 1 + 1 + 2 + 2 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000121112191 and 1000121112200.

It is not an unprimeable number, because it can be changed into a prime (1000121112311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38466196611 + ... + 38466196636.

It is an arithmetic number, because the mean of its divisors is an integer number (269263376368).

Almost surely, 2^{1000121112211} is an apocalyptic number.

1000121112211 is a deficient number, since it is larger than the sum of its proper divisors (76932393261).

1000121112211 is an equidigital number, since it uses as much as digits as its factorization.

1000121112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76932393260.

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

Adding to 1000121112211 its reverse (1122111210001), we get a palindrome (2122232322212).

The spelling of 1000121112211 in words is "one trillion, one hundred twenty-one million, one hundred twelve thousand, two hundred eleven".