1111212011011 has 2 divisors, whose sum is σ = 1111212011012. Its totient is φ = 1111212011010.

The previous prime is 1111212011009. The next prime is 1111212011047. The reversal of 1111212011011 is 1101102121111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111212011011 - 2¹ = 1111212011009 is a prime.

It is a super-2 number, since 2×1111212011011² (a number of 25 digits) contains 22 as substring.

Together with 1111212011009, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1111212010982 and 1111212011000.

It is not a weakly prime, because it can be changed into another prime (1111212018011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555606005505 + 555606005506.

It is an arithmetic number, because the mean of its divisors is an integer number (555606005506).

Almost surely, 2^{1111212011011} is an apocalyptic number.

1111212011011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111212011011 is an equidigital number, since it uses as much as digits as its factorization.

1111212011011 is an evil number, because the sum of its binary digits is even.

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

Adding to 1111212011011 its reverse (1101102121111), we get a palindrome (2212314132122).

The spelling of 1111212011011 in words is "one trillion, one hundred eleven billion, two hundred twelve million, eleven thousand, eleven".