1000121220111 has 16 divisors (see below), whose sum is σ = 1436225724416. Its totient is φ = 615393114336.

The previous prime is 1000121220089. The next prime is 1000121220113. The reversal of 1000121220111 is 1110221210001.

It is not a de Polignac number, because 1000121220111 - 2²² = 1000117025807 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 (1000121220113) 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, 1007995 + ... + 1736748.

It is an arithmetic number, because the mean of its divisors is an integer number (89764107776).

Almost surely, 2^{1000121220111} is an apocalyptic number.

1000121220111 is a deficient number, since it is larger than the sum of its proper divisors (436104504305).

1000121220111 is a wasteful number, since it uses less digits than its factorization.

1000121220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2754102.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1000121220111 its reverse (1110221210001), we get a palindrome (2110342430112).

The spelling of 1000121220111 in words is "one trillion, one hundred twenty-one million, two hundred twenty thousand, one hundred eleven".