1200211201111 has 16 divisors (see below), whose sum is σ = 1315415928960. Its totient is φ = 1088424303840.

The previous prime is 1200211201087. The next prime is 1200211201141. The reversal of 1200211201111 is 1111021120021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1200211201111 - 2⁷ = 1200211200983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200211201091 and 1200211201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200211201141) 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, 2913945 + ... + 3300226.

It is an arithmetic number, because the mean of its divisors is an integer number (82213495560).

Almost surely, 2^{1200211201111} is an apocalyptic number.

1200211201111 is a deficient number, since it is larger than the sum of its proper divisors (115204727849).

1200211201111 is a wasteful number, since it uses less digits than its factorization.

1200211201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6214446.

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

Adding to 1200211201111 its reverse (1111021120021), we get a palindrome (2311232321132).

The spelling of 1200211201111 in words is "one trillion, two hundred billion, two hundred eleven million, two hundred one thousand, one hundred eleven".