1200220111111 has 16 divisors (see below), whose sum is σ = 1382297748480. Its totient is φ = 1020798548640.

The previous prime is 1200220111081. The next prime is 1200220111141. The reversal of 1200220111111 is 1111110220021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1200220111081) and next prime (1200220111141).

It is a cyclic number.

It is not a de Polignac number, because 1200220111111 - 2¹¹ = 1200220109063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200220111091 and 1200220111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200220111141) 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, 9251385 + ... + 9380221.

It is an arithmetic number, because the mean of its divisors is an integer number (86393609280).

Almost surely, 2^{1200220111111} is an apocalyptic number.

1200220111111 is a deficient number, since it is larger than the sum of its proper divisors (182077637369).

1200220111111 is a wasteful number, since it uses less digits than its factorization.

1200220111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139134.

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

Adding to 1200220111111 its reverse (1111110220021), we get a palindrome (2311330331132).

The spelling of 1200220111111 in words is "one trillion, two hundred billion, two hundred twenty million, one hundred eleven thousand, one hundred eleven".