1200011010978 has 64 divisors (see below), whose sum is σ = 2721577622400. Its totient is φ = 349684439040.

The previous prime is 1200011010977. The next prime is 1200011011027. The reversal of 1200011010978 is 8790101100021.

It is not an unprimeable number, because it can be changed into a prime (1200011010977) 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, 4373628 + ... + 4639896.

It is an arithmetic number, because the mean of its divisors is an integer number (42524650350).

Almost surely, 2^{1200011010978} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200011010978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1360788811200).

1200011010978 is an abundant number, since it is smaller than the sum of its proper divisors (1521566611422).

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

1200011010978 is a wasteful number, since it uses less digits than its factorization.

1200011010978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269347.

The product of its (nonzero) digits is 1008, while the sum is 30.

Adding to 1200011010978 its reverse (8790101100021), we get a palindrome (9990112110999).

The spelling of 1200011010978 in words is "one trillion, two hundred billion, eleven million, ten thousand, nine hundred seventy-eight".