1001122011111 has 16 divisors (see below), whose sum is σ = 1380936866400. Its totient is φ = 644363545728.

The previous prime is 1001122011041. The next prime is 1001122011119. The reversal of 1001122011111 is 1111102211001.

It is not a de Polignac number, because 1001122011111 - 2²⁷ = 1000987793383 is a prime.

It is a super-2 number, since 2×1001122011111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001122011119) 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 15 ways as a sum of consecutive naturals, for example, 1245205 + ... + 1884881.

It is an arithmetic number, because the mean of its divisors is an integer number (86308554150).

Almost surely, 2^{1001122011111} is an apocalyptic number.

1001122011111 is a deficient number, since it is larger than the sum of its proper divisors (379814855289).

1001122011111 is a wasteful number, since it uses less digits than its factorization.

1001122011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657698.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1001122011111 its reverse (1111102211001), we get a palindrome (2112224222112).

The spelling of 1001122011111 in words is "one trillion, one billion, one hundred twenty-two million, eleven thousand, one hundred eleven".