1222201021100 has 36 divisors (see below), whose sum is σ = 2653717656408. Its totient is φ = 488596272000.

The previous prime is 1222201021091. The next prime is 1222201021117. The reversal of 1222201021100 is 11201022221.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3378746 + ... + 3722945.

Almost surely, 2^{1222201021100} is an apocalyptic number.

1222201021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222201021100 is an abundant number, since it is smaller than the sum of its proper divisors (1431516635308).

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

1222201021100 is a wasteful number, since it uses less digits than its factorization.

1222201021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7103426 (or 7103419 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1222201021100 its reverse (11201022221), we get a palindrome (1233402043321).

The spelling of 1222201021100 in words is "one trillion, two hundred twenty-two billion, two hundred one million, twenty-one thousand, one hundred".