133201031221 has 2 divisors, whose sum is σ = 133201031222. Its totient is φ = 133201031220.

The previous prime is 133201031219. The next prime is 133201031239. The reversal of 133201031221 is 122130102331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86797408996 + 46403622225 = 294614^2 + 215415^2 .

It is a cyclic number.

It is not a de Polignac number, because 133201031221 - 2¹ = 133201031219 is a prime.

Together with 133201031219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133201071221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66600515610 + 66600515611.

It is an arithmetic number, because the mean of its divisors is an integer number (66600515611).

Almost surely, 2^133201031221 is an apocalyptic number.

It is an amenable number.

133201031221 is a deficient number, since it is larger than the sum of its proper divisors (1).

133201031221 is an equidigital number, since it uses as much as digits as its factorization.

133201031221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 133201031221 its reverse (122130102331), we get a palindrome (255331133552).

The spelling of 133201031221 in words is "one hundred thirty-three billion, two hundred one million, thirty-one thousand, two hundred twenty-one".