1210020002120 has 32 divisors (see below), whose sum is σ = 2737754769600. Its totient is φ = 481304042688.

The previous prime is 1210020002119. The next prime is 1210020002123. The reversal of 1210020002120 is 212000200121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1210020002123) 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 7 ways as a sum of consecutive naturals, for example, 84491444 + ... + 84505763.

It is an arithmetic number, because the mean of its divisors is an integer number (85554836550).

Almost surely, 2^{1210020002120} is an apocalyptic number.

1210020002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210020002120 is an abundant number, since it is smaller than the sum of its proper divisors (1527734767480).

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

1210020002120 is a wasteful number, since it uses less digits than its factorization.

1210020002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168997397 (or 168997393 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1210020002120 its reverse (212000200121), we get a palindrome (1422020202241).

The spelling of 1210020002120 in words is "one trillion, two hundred ten billion, twenty million, two thousand, one hundred twenty".