1201020012 has 36 divisors (see below), whose sum is σ = 3214496376. Its totient is φ = 376790400.

The previous prime is 1201019993. The next prime is 1201020047. The reversal of 1201020012 is 2100201021.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 1201019976 and 1201020003.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 980614 + ... + 981837.

It is an arithmetic number, because the mean of its divisors is an integer number (89291566).

Almost surely, 2^1201020012 is an apocalyptic number.

1201020012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1201020012 is an abundant number, since it is smaller than the sum of its proper divisors (2013476364).

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

1201020012 is a wasteful number, since it uses less digits than its factorization.

1201020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962478 (or 1962473 counting only the distinct ones).

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

The square root of 1201020012 is about 34655.7356291855. The cubic root of 1201020012 is about 1062.9595740498.

Adding to 1201020012 its reverse (2100201021), we get a palindrome (3301221033).

The spelling of 1201020012 in words is "one billion, two hundred one million, twenty thousand, twelve".