1111001201111 has 8 divisors (see below), whose sum is σ = 1154128354848. Its totient is φ = 1068637360000.

The previous prime is 1111001201087. The next prime is 1111001201137. The reversal of 1111001201111 is 1111021001111.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111001201111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111001201092 and 1111001201101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111001201711) 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, 190825190 + ... + 190831011.

It is an arithmetic number, because the mean of its divisors is an integer number (144266044356).

Almost surely, 2^{1111001201111} is an apocalyptic number.

1111001201111 is a deficient number, since it is larger than the sum of its proper divisors (43127153737).

1111001201111 is an equidigital number, since it uses as much as digits as its factorization.

1111001201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381656313.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 1111001201111 its reverse (1111021001111), we get a palindrome (2222022202222).

The spelling of 1111001201111 in words is "one trillion, one hundred eleven billion, one million, two hundred one thousand, one hundred eleven".