1001011222111 has 4 divisors (see below), whose sum is σ = 1001025073872. Its totient is φ = 1000997370352.

The previous prime is 1001011222091. The next prime is 1001011222151. The reversal of 1001011222111 is 1112221101001.

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 1001011222111 - 2¹⁷ = 1001011091039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001011222091 and 1001011222100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001011222151) 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, 6816910 + ... + 6962203.

It is an arithmetic number, because the mean of its divisors is an integer number (250256268468).

Almost surely, 2^{1001011222111} is an apocalyptic number.

1001011222111 is a deficient number, since it is larger than the sum of its proper divisors (13851761).

1001011222111 is an equidigital number, since it uses as much as digits as its factorization.

1001011222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13851760.

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

Adding to 1001011222111 its reverse (1112221101001), we get a palindrome (2113232323112).

The spelling of 1001011222111 in words is "one trillion, one billion, eleven million, two hundred twenty-two thousand, one hundred eleven".