1211200112011 has 8 divisors (see below), whose sum is σ = 1213463631744. Its totient is φ = 1208937162240.

The previous prime is 1211200112009. The next prime is 1211200112029. The reversal of 1211200112011 is 1102110021121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211200112011 - 2¹ = 1211200112009 is a prime.

It is a super-2 number, since 2×1211200112011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211200111982 and 1211200112000.

It is not an unprimeable number, because it can be changed into a prime (1211200110011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4236981 + ... + 4513801.

It is an arithmetic number, because the mean of its divisors is an integer number (151682953968).

Almost surely, 2^{1211200112011} is an apocalyptic number.

1211200112011 is a deficient number, since it is larger than the sum of its proper divisors (2263519733).

1211200112011 is an equidigital number, since it uses as much as digits as its factorization.

1211200112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284981.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211200112011 its reverse (1102110021121), we get a palindrome (2313310133132).

The spelling of 1211200112011 in words is "one trillion, two hundred eleven billion, two hundred million, one hundred twelve thousand, eleven".