1111001212211 has 32 divisors (see below), whose sum is σ = 1325632905216. Its totient is φ = 919271808000.

The previous prime is 1111001212129. The next prime is 1111001212231. The reversal of 1111001212211 is 1122121001111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111001212211 is a prime.

It is a super-2 number, since 2×1111001212211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111001212231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8181791 + ... + 8316471.

It is an arithmetic number, because the mean of its divisors is an integer number (41426028288).

Almost surely, 2^{1111001212211} is an apocalyptic number.

1111001212211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1111001212211 is a deficient number, since it is larger than the sum of its proper divisors (214631693005).

1111001212211 is a wasteful number, since it uses less digits than its factorization.

1111001212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136163.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1111001212211 its reverse (1122121001111), we get a palindrome (2233122213322).

The spelling of 1111001212211 in words is "one trillion, one hundred eleven billion, one million, two hundred twelve thousand, two hundred eleven".