1221201322032 has 80 divisors (see below), whose sum is σ = 3243899877120. Its totient is φ = 395592742656.

The previous prime is 1221201322021. The next prime is 1221201322037. The reversal of 1221201322032 is 2302231021221.

It is not an unprimeable number, because it can be changed into a prime (1221201322037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1080283 + ... + 1899845.

It is an arithmetic number, because the mean of its divisors is an integer number (40548748464).

Almost surely, 2^{1221201322032} is an apocalyptic number.

1221201322032 is a gapful number since it is divisible by the number (12) 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 1221201322032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621949938560).

1221201322032 is an abundant number, since it is smaller than the sum of its proper divisors (2022698555088).

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

1221201322032 is a wasteful number, since it uses less digits than its factorization.

1221201322032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820450 (or 820444 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1221201322032 its reverse (2302231021221), we get a palindrome (3523432343253).

The spelling of 1221201322032 in words is "one trillion, two hundred twenty-one billion, two hundred one million, three hundred twenty-two thousand, thirty-two".