1200001110020 has 12 divisors (see below), whose sum is σ = 2520002331084. Its totient is φ = 480000444000.

The previous prime is 1200001110019. The next prime is 1200001110073. The reversal of 1200001110020 is 200111000021.

It can be written as a sum of positive squares in 2 ways, for example, as 321042359236 + 878958750784 = 566606^2 + 937528^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30000027731 + ... + 30000027770.

It is an arithmetic number, because the mean of its divisors is an integer number (210000194257).

Almost surely, 2^{1200001110020} is an apocalyptic number.

1200001110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200001110020 is an abundant number, since it is smaller than the sum of its proper divisors (1320001221064).

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

1200001110020 is a wasteful number, since it uses less digits than its factorization.

1200001110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60000055510 (or 60000055508 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1200001110020 its reverse (200111000021), we get a palindrome (1400112110041).

The spelling of 1200001110020 in words is "one trillion, two hundred billion, one million, one hundred ten thousand, twenty".