1200111231011 has 12 divisors (see below), whose sum is σ = 1522961191800. Its totient is φ = 935151608160.

The previous prime is 1200111230993. The next prime is 1200111231023. The reversal of 1200111231011 is 1101321110021.

It is not a de Polignac number, because 1200111231011 - 2¹⁰ = 1200111229987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200111231031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1113275186 + ... + 1113276263.

It is an arithmetic number, because the mean of its divisors is an integer number (126913432650).

Almost surely, 2^{1200111231011} is an apocalyptic number.

1200111231011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200111231011 is a deficient number, since it is larger than the sum of its proper divisors (322849960789).

1200111231011 is a wasteful number, since it uses less digits than its factorization.

1200111231011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226551474 (or 2226551467 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1200111231011 its reverse (1101321110021), we get a palindrome (2301432341032).

The spelling of 1200111231011 in words is "one trillion, two hundred billion, one hundred eleven million, two hundred thirty-one thousand, eleven".