1210120021200 has 120 divisors (see below), whose sum is σ = 3884828292576. Its totient is φ = 321998528000.

The previous prime is 1210120021199. The next prime is 1210120021207. The reversal of 1210120021200 is 21200210121.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210120021207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 540546 + ... + 1646945.

Almost surely, 2^{1210120021200} is an apocalyptic number.

1210120021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210120021200 is an abundant number, since it is smaller than the sum of its proper divisors (2674708271376).

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

1210120021200 is a wasteful number, since it uses less digits than its factorization.

1210120021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187973 (or 2187962 counting only the distinct ones).

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

Adding to 1210120021200 its reverse (21200210121), we get a palindrome (1231320231321).

The spelling of 1210120021200 in words is "one trillion, two hundred ten billion, one hundred twenty million, twenty-one thousand, two hundred".