1211202220000 has 120 divisors (see below), whose sum is σ = 3043140208416. Its totient is φ = 474172416000.

The previous prime is 1211202219977. The next prime is 1211202220031. The reversal of 1211202220000 is 222021121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 295744 + ... + 1584256.

Almost surely, 2^{1211202220000} is an apocalyptic number.

1211202220000 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 1211202220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1521570104208).

1211202220000 is an abundant number, since it is smaller than the sum of its proper divisors (1831937988416).

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

1211202220000 is an equidigital number, since it uses as much as digits as its factorization.

1211202220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288590 (or 1288567 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1211202220000 its reverse (222021121), we get a palindrome (1211424241121).

The spelling of 1211202220000 in words is "one trillion, two hundred eleven billion, two hundred two million, two hundred twenty thousand".