1212210100000 has 288 divisors, whose sum is σ = 3069825018624. Its totient is φ = 470880000000.

The previous prime is 1212210099931. The next prime is 1212210100009. The reversal of 1212210100000 is 10122121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 1212210100000.

It is not an unprimeable number, because it can be changed into a prime (1212210100009) 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 47 ways as a sum of consecutive naturals, for example, 1111099455 + ... + 1111100545.

It is an arithmetic number, because the mean of its divisors is an integer number (10659114648).

Almost surely, 2^{1212210100000} is an apocalyptic number.

1212210100000 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 1212210100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1534912509312).

1212210100000 is an abundant number, since it is smaller than the sum of its proper divisors (1857614918624).

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

1212210100000 is an equidigital number, since it uses as much as digits as its factorization.

1212210100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438 (or 1410 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1212210100000 its reverse (10122121), we get a palindrome (1212220222121).

The spelling of 1212210100000 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred thousand".