1201001001012 has 60 divisors (see below), whose sum is σ = 3139979156160. Its totient is φ = 400292187984.

The previous prime is 1201001000993. The next prime is 1201001001127. The reversal of 1201001001012 is 2101001001021.

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 = 1201001000985 and 1201001001003.

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 3022789 + ... + 3396947.

It is an arithmetic number, because the mean of its divisors is an integer number (52332985936).

Almost surely, 2^{1201001001012} is an apocalyptic number.

1201001001012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1201001001012 is an abundant number, since it is smaller than the sum of its proper divisors (1938978155148).

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

1201001001012 is a wasteful number, since it uses less digits than its factorization.

1201001001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384082 (or 384071 counting only the distinct ones).

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

Adding to 1201001001012 its reverse (2101001001021), we get a palindrome (3302002002033).

Subtracting 1201001001012 from its reverse (2101001001021), we obtain a palindrome (900000000009).

The spelling of 1201001001012 in words is "one trillion, two hundred one billion, one million, one thousand, twelve".