1210021210120 has 32 divisors (see below), whose sum is σ = 2725219598400. Its totient is φ = 483533483968.

The previous prime is 1210021210109. The next prime is 1210021210129. The reversal of 1210021210120 is 210121200121.

It is a self number, because there is not a number n which added to its sum of digits gives 1210021210120.

It is not an unprimeable number, because it can be changed into a prime (1210021210129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14802484 + ... + 14884003.

It is an arithmetic number, because the mean of its divisors is an integer number (85163112450).

Almost surely, 2^{1210021210120} is an apocalyptic number.

1210021210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210021210120 is an abundant number, since it is smaller than the sum of its proper divisors (1515198388280).

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

1210021210120 is a wasteful number, since it uses less digits than its factorization.

1210021210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29687517 (or 29687513 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1210021210120 its reverse (210121200121), we get a palindrome (1420142410241).

Subtracting from 1210021210120 its reverse (210121200121), we obtain a palindrome (999900009999).

The spelling of 1210021210120 in words is "one trillion, two hundred ten billion, twenty-one million, two hundred ten thousand, one hundred twenty".