1200111111010 has 24 divisors (see below), whose sum is σ = 2512885715100. Its totient is φ = 411466666464.

The previous prime is 1200111110999. The next prime is 1200111111037. The reversal of 1200111111010 is 101111110021.

It can be written as a sum of positive squares in 2 ways, for example, as 1040524443721 + 159586667289 = 1020061^2 + 399483^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1224602685 + ... + 1224603664.

Almost surely, 2^{1200111111010} is an apocalyptic number.

1200111111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200111111010 is an abundant number, since it is smaller than the sum of its proper divisors (1312774604090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200111111010 is a wasteful number, since it uses less digits than its factorization.

1200111111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449206370 (or 2449206363 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 1200111111010 its reverse (101111110021), we get a palindrome (1301222221031).

The spelling of 1200111111010 in words is "one trillion, two hundred billion, one hundred eleven million, one hundred eleven thousand, ten".