1200121111011 has 32 divisors (see below), whose sum is σ = 1647023266368. Its totient is φ = 776746713600.

The previous prime is 1200121111009. The next prime is 1200121111027. The reversal of 1200121111011 is 1101111210021.

It is not a de Polignac number, because 1200121111011 - 2¹ = 1200121111009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200121111001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121207161 + ... + 121217061.

It is an arithmetic number, because the mean of its divisors is an integer number (51469477074).

Almost surely, 2^{1200121111011} is an apocalyptic number.

1200121111011 is a deficient number, since it is larger than the sum of its proper divisors (446902155357).

1200121111011 is a wasteful number, since it uses less digits than its factorization.

1200121111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12231.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1200121111011 its reverse (1101111210021), we get a palindrome (2301232321032).

The spelling of 1200121111011 in words is "one trillion, two hundred billion, one hundred twenty-one million, one hundred eleven thousand, eleven".