1200102021012 has 12 divisors (see below), whose sum is σ = 2800238049056. Its totient is φ = 400034007000.

The previous prime is 1200102021011. The next prime is 1200102021029. The reversal of 1200102021012 is 2101202010021.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 100008501751 = 1200102021012 / (1 + 2 + 0 + 0 + 1 + 0 + 2 + 0 + 2 + 1 + 0 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200102021011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50004250864 + ... + 50004250887.

Almost surely, 2^{1200102021012} is an apocalyptic number.

1200102021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200102021012 is an abundant number, since it is smaller than the sum of its proper divisors (1600136028044).

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

1200102021012 is a wasteful number, since it uses less digits than its factorization.

1200102021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100008501758 (or 100008501756 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200102021012 its reverse (2101202010021), we get a palindrome (3301304031033).

The spelling of 1200102021012 in words is "one trillion, two hundred billion, one hundred two million, twenty-one thousand, twelve".