1201022221000 has 64 divisors (see below), whose sum is σ = 3211876586880. Its totient is φ = 411779044800.

The previous prime is 1201022220991. The next prime is 1201022221001. The reversal of 1201022221000 is 1222201021.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1201022221001) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 85780302 + ... + 85794301.

It is an arithmetic number, because the mean of its divisors is an integer number (50185571670).

Almost surely, 2^{1201022221000} is an apocalyptic number.

1201022221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201022221000 is an abundant number, since it is smaller than the sum of its proper divisors (2010854365880).

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

1201022221000 is a wasteful number, since it uses less digits than its factorization.

1201022221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171574631 (or 171574617 counting only the distinct ones).

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

Adding to 1201022221000 its reverse (1222201021), we get a palindrome (1202244422021).

The spelling of 1201022221000 in words is "one trillion, two hundred one billion, twenty-two million, two hundred twenty-one thousand".