1200120100011 has 120 divisors (see below), whose sum is σ = 2131602048576. Its totient is φ = 670637076480.

The previous prime is 1200120099973. The next prime is 1200120100013. The reversal of 1200120100011 is 1100010210021.

It is a happy number.

It is not a de Polignac number, because 1200120100011 - 2¹⁴ = 1200120083627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1200120099966 and 1200120100002.

It is not an unprimeable number, because it can be changed into a prime (1200120100013) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 347154795 + ... + 347158251.

Almost surely, 2^{1200120100011} is an apocalyptic number.

1200120100011 is a deficient number, since it is larger than the sum of its proper divisors (931481948565).

1200120100011 is a wasteful number, since it uses less digits than its factorization.

1200120100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391 (or 5375 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1200120100011 its reverse (1100010210021), we get a palindrome (2300130310032).

The spelling of 1200120100011 in words is "one trillion, two hundred billion, one hundred twenty million, one hundred thousand, eleven".