1211011119999 has 6 divisors (see below), whose sum is σ = 1749238284456. Its totient is φ = 807340746660.

The previous prime is 1211011119931. The next prime is 1211011120019. The reversal of 1211011119999 is 9999111101121.

It is not a de Polignac number, because 1211011119999 - 2¹⁷ = 1211010988927 is a prime.

It is a super-2 number, since 2×1211011119999² (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 (1211011119919) 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, 67278395547 + ... + 67278395564.

It is an arithmetic number, because the mean of its divisors is an integer number (291539714076).

Almost surely, 2^{1211011119999} is an apocalyptic number.

1211011119999 is a deficient number, since it is larger than the sum of its proper divisors (538227164457).

1211011119999 is a wasteful number, since it uses less digits than its factorization.

1211011119999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134556791117 (or 134556791114 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 45.

It can be divided in two parts, 121101 and 1119999, that added together give a triangular number (1241100 = T₁₅₇₅).

The spelling of 1211011119999 in words is "one trillion, two hundred eleven billion, eleven million, one hundred nineteen thousand, nine hundred ninety-nine".