133212221000 has 64 divisors (see below), whose sum is σ = 330052909680. Its totient is φ = 50150476800.

The previous prime is 133212220991. The next prime is 133212221011. The reversal of 133212221000 is 122212331.

It can be written as a sum of positive squares in 8 ways, for example, as 45798568036 + 87413652964 = 214006^2 + 295658^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 133212221000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3901007 + ... + 3935006.

Almost surely, 2^133212221000 is an apocalyptic number.

133212221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133212221000 is an abundant number, since it is smaller than the sum of its proper divisors (196840688680).

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

133212221000 is a wasteful number, since it uses less digits than its factorization.

133212221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7836051 (or 7836037 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 133212221000 its reverse (122212331), we get a palindrome (133334433331).

The spelling of 133212221000 in words is "one hundred thirty-three billion, two hundred twelve million, two hundred twenty-one thousand".