1021200120006 has 64 divisors (see below), whose sum is σ = 2236946181120. Its totient is φ = 308222812160.

The previous prime is 1021200120001. The next prime is 1021200120019. The reversal of 1021200120006 is 6000210021201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021200120001) by changing a digit.

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, 128659270 + ... + 128667206.

It is an arithmetic number, because the mean of its divisors is an integer number (34952284080).

Almost surely, 2^{1021200120006} is an apocalyptic number.

1021200120006 is an abundant number, since it is smaller than the sum of its proper divisors (1215746061114).

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

1021200120006 is a wasteful number, since it uses less digits than its factorization.

1021200120006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15469.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1021200120006 its reverse (6000210021201), we get a palindrome (7021410141207).

The spelling of 1021200120006 in words is "one trillion, twenty-one billion, two hundred million, one hundred twenty thousand, six".