1001122111 has 8 divisors (see below), whose sum is σ = 1093348224. Its totient is φ = 909098520.

The previous prime is 1001122097. The next prime is 1001122121. The reversal of 1001122111 is 1112211001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1001122111 - 2²⁷ = 866904383 is a prime.

It is a super-2 number, since 2×1001122111² = 2004490962266192642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001122121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40195 + ... + 60148.

It is an arithmetic number, because the mean of its divisors is an integer number (136668528).

Almost surely, 2^1001122111 is an apocalyptic number.

1001122111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001122111 is a deficient number, since it is larger than the sum of its proper divisors (92226113).

1001122111 is a wasteful number, since it uses less digits than its factorization.

1001122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101261.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1001122111 is about 31640.5137600514. The cubic root of 1001122111 is about 1000.3738971835.

Adding to 1001122111 its reverse (1112211001), we get a palindrome (2113333112).

It can be divided in two parts, 100 and 1122111, that added together give a palindrome (1122211).

The spelling of 1001122111 in words is "one billion, one million, one hundred twenty-two thousand, one hundred eleven".