331221231000133 has 4 divisors (see below), whose sum is σ = 331376660955808. Its totient is φ = 331065801044460.

The previous prime is 331221231000097. The next prime is 331221231000139. The reversal of 331221231000133 is 331000132122133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 331221231000133 - 2⁹ = 331221230999621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331221231000098 and 331221231000107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331221231000139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77714974641 + ... + 77714978902.

It is an arithmetic number, because the mean of its divisors is an integer number (82844165238952).

Almost surely, 2^{331221231000133} is an apocalyptic number.

It is an amenable number.

331221231000133 is a deficient number, since it is larger than the sum of its proper divisors (155429955675).

331221231000133 is a wasteful number, since it uses less digits than its factorization.

331221231000133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155429955674.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 331221231000133 its reverse (331000132122133), we get a palindrome (662221363122266).

The spelling of 331221231000133 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirty-one million, one hundred thirty-three", and thus it is an aban number.