1210100020000 has 120 divisors (see below), whose sum is σ = 2989495555200. Its totient is φ = 482012832000.

The previous prime is 1210100019991. The next prime is 1210100020007. The reversal of 1210100020000 is 200010121.

It is not an unprimeable number, because it can be changed into a prime (1210100020007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4653421 + ... + 4906579.

It is an arithmetic number, because the mean of its divisors is an integer number (24912462960).

Almost surely, 2^{1210100020000} is an apocalyptic number.

1210100020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210100020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1494747777600).

1210100020000 is an abundant number, since it is smaller than the sum of its proper divisors (1779395535200).

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

1210100020000 is an equidigital number, since it uses as much as digits as its factorization.

1210100020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253428 (or 253405 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 1210100020000 its reverse (200010121), we get a palindrome (1210300030121).

The spelling of 1210100020000 in words is "one trillion, two hundred ten billion, one hundred million, twenty thousand".