1000001121012 has 120 divisors (see below), whose sum is σ = 2810339495040. Its totient is φ = 309070805760.

The previous prime is 1000001120977. The next prime is 1000001121019. The reversal of 1000001121012 is 2101211000001.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1000001120985 and 1000001121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000001121019) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1438789 + ... + 2017452.

It is an arithmetic number, because the mean of its divisors is an integer number (23419495792).

Almost surely, 2^{1000001121012} is an apocalyptic number.

1000001121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1000001121012 is an abundant number, since it is smaller than the sum of its proper divisors (1810338374028).

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

1000001121012 is a wasteful number, since it uses less digits than its factorization.

1000001121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456323 (or 3456312 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1000001121012 its reverse (2101211000001), we get a palindrome (3101212121013).

The spelling of 1000001121012 in words is "one trillion, one million, one hundred twenty-one thousand, twelve".