133231012022221 has 4 divisors (see below), whose sum is σ = 133467656804352. Its totient is φ = 132994367240092.

The previous prime is 133231012022153. The next prime is 133231012022261. The reversal of 133231012022221 is 122220210132331.

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 a de Polignac number, because none of the positive numbers 2^k-133231012022221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133231012022261) 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, 118322390221 + ... + 118322391346.

It is an arithmetic number, because the mean of its divisors is an integer number (33366914201088).

Almost surely, 2^{133231012022221} is an apocalyptic number.

It is an amenable number.

133231012022221 is a deficient number, since it is larger than the sum of its proper divisors (236644782131).

133231012022221 is an equidigital number, since it uses as much as digits as its factorization.

133231012022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236644782130.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 133231012022221 its reverse (122220210132331), we get a palindrome (255451222154552).

The spelling of 133231012022221 in words is "one hundred thirty-three trillion, two hundred thirty-one billion, twelve million, twenty-two thousand, two hundred twenty-one".