1211101200111 has 16 divisors (see below), whose sum is σ = 1762341717888. Its totient is φ = 733692405600.

The previous prime is 1211101200107. The next prime is 1211101200157. The reversal of 1211101200111 is 1110021011121.

It is not a de Polignac number, because 1211101200111 - 2² = 1211101200107 is a prime.

It is a super-2 number, since 2×1211101200111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211101200191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7628281 + ... + 7785426.

It is an arithmetic number, because the mean of its divisors is an integer number (110146357368).

Almost surely, 2^{1211101200111} is an apocalyptic number.

1211101200111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211101200111 is a deficient number, since it is larger than the sum of its proper divisors (551240517777).

1211101200111 is a wasteful number, since it uses less digits than its factorization.

1211101200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15416102.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1211101200111 its reverse (1110021011121), we get a palindrome (2321122211232).

The spelling of 1211101200111 in words is "one trillion, two hundred eleven billion, one hundred one million, two hundred thousand, one hundred eleven".