11111110001211 has 32 divisors (see below), whose sum is σ = 16762755868416. Its totient is φ = 6487134480000.

The previous prime is 11111110001197. The next prime is 11111110001227. The reversal of 11111110001211 is 11210001111111.

It is not a de Polignac number, because 11111110001211 - 2¹⁰ = 11111110000187 is a prime.

It is a super-2 number, since 2×11111110001211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11111110001611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44926225 + ... + 45172866.

It is an arithmetic number, because the mean of its divisors is an integer number (523836120888).

Almost surely, 2^{11111110001211} is an apocalyptic number.

11111110001211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11111110001211 is a deficient number, since it is larger than the sum of its proper divisors (5651645867205).

11111110001211 is a wasteful number, since it uses less digits than its factorization.

11111110001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90099243.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 11111110001211 its reverse (11210001111111), we get a palindrome (22321111112322).

The spelling of 11111110001211 in words is "eleven trillion, one hundred eleven billion, one hundred ten million, one thousand, two hundred eleven".