1200000001122 has 64 divisors (see below), whose sum is σ = 2874428968320. Its totient is φ = 368892100800.

The previous prime is 1200000001073. The next prime is 1200000001141. The reversal of 1200000001122 is 2211000000021.

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

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 31 ways as a sum of consecutive naturals, for example, 17529 + ... + 1549292.

It is an arithmetic number, because the mean of its divisors is an integer number (44912952630).

Almost surely, 2^{1200000001122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200000001122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437214484160).

1200000001122 is an abundant number, since it is smaller than the sum of its proper divisors (1674428967198).

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

1200000001122 is a wasteful number, since it uses less digits than its factorization.

1200000001122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567936 (or 1567930 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1200000001122 its reverse (2211000000021), we get a palindrome (3411000001143).

The spelling of 1200000001122 in words is "one trillion, two hundred billion, one thousand, one hundred twenty-two".