1111001121211 has 6 divisors (see below), whose sum is σ = 1137439224420. Its totient is φ = 1085163884028.

The previous prime is 1111001121151. The next prime is 1111001121221. The reversal of 1111001121211 is 1121211001111.

It is a de Polignac number, because none of the positive numbers 2^k-1111001121211 is a prime.

It is a super-2 number, since 2×1111001121211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111001121191 and 1111001121200.

It is not an unprimeable number, because it can be changed into a prime (1111001121221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 300431121 + ... + 300434818.

It is an arithmetic number, because the mean of its divisors is an integer number (189573204070).

Almost surely, 2^{1111001121211} is an apocalyptic number.

1111001121211 is a deficient number, since it is larger than the sum of its proper divisors (26438103209).

1111001121211 is an frugal number, since it uses more digits than its factorization.

1111001121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600866025 (or 600865982 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1111001121211 its reverse (1121211001111), we get a palindrome (2232212122322).

The spelling of 1111001121211 in words is "one trillion, one hundred eleven billion, one million, one hundred twenty-one thousand, two hundred eleven".