133221121000 has 256 divisors, whose sum is σ = 346632099840. Its totient is φ = 47916000000.

The previous prime is 133221120997. The next prime is 133221121037. The reversal of 133221121000 is 121122331.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 134430505 + ... + 134431495.

It is an arithmetic number, because the mean of its divisors is an integer number (1354031640).

Almost surely, 2^133221121000 is an apocalyptic number.

133221121000 is a gapful number since it is divisible by the number (10) 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 133221121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173316049920).

133221121000 is an abundant number, since it is smaller than the sum of its proper divisors (213410978840).

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

133221121000 is a wasteful number, since it uses less digits than its factorization.

133221121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 133221121000 its reverse (121122331), we get a palindrome (133342243331).

The spelling of 133221121000 in words is "one hundred thirty-three billion, two hundred twenty-one million, one hundred twenty-one thousand".