1221132443000 has 32 divisors (see below), whose sum is σ = 2857449918960. Its totient is φ = 488452976800.

The previous prime is 1221132442997. The next prime is 1221132443021. The reversal of 1221132443000 is 3442311221.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 610565222 + ... + 610567221.

Almost surely, 2^{1221132443000} is an apocalyptic number.

1221132443000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221132443000 is an abundant number, since it is smaller than the sum of its proper divisors (1636317475960).

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

1221132443000 is a wasteful number, since it uses less digits than its factorization.

1221132443000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221132464 (or 1221132450 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1221132443000 its reverse (3442311221), we get a palindrome (1224574754221).

The spelling of 1221132443000 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-two million, four hundred forty-three thousand".