1221062009232 has 160 divisors (see below), whose sum is σ = 3507615498240. Its totient is φ = 363490490880.

The previous prime is 1221062009147. The next prime is 1221062009261. The reversal of 1221062009232 is 2329002601221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221062009232.

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 31 ways as a sum of consecutive naturals, for example, 97468153 + ... + 97480679.

It is an arithmetic number, because the mean of its divisors is an integer number (21922596864).

Almost surely, 2^{1221062009232} is an apocalyptic number.

1221062009232 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 1221062009232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1753807749120).

1221062009232 is an abundant number, since it is smaller than the sum of its proper divisors (2286553489008).

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

1221062009232 is a wasteful number, since it uses less digits than its factorization.

1221062009232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17621 (or 17615 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 1221062009232 in words is "one trillion, two hundred twenty-one billion, sixty-two million, nine thousand, two hundred thirty-two".