1222202021000 has 128 divisors (see below), whose sum is σ = 2870279193600. Its totient is φ = 487118707200.

The previous prime is 1222202020937. The next prime is 1222202021071. The reversal of 1222202021000 is 1202022221.

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 31 ways as a sum of consecutive naturals, for example, 640902047 + ... + 640903953.

It is an arithmetic number, because the mean of its divisors is an integer number (22424056200).

Almost surely, 2^{1222202021000} is an apocalyptic number.

1222202021000 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 1222202021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1435139596800).

1222202021000 is an abundant number, since it is smaller than the sum of its proper divisors (1648077172600).

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

1222202021000 is a wasteful number, since it uses less digits than its factorization.

1222202021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904 (or 3890 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1222202021000 its reverse (1202022221), we get a palindrome (1223404043221).

The spelling of 1222202021000 in words is "one trillion, two hundred twenty-two billion, two hundred two million, twenty-one thousand".