133210009991 has 2 divisors, whose sum is σ = 133210009992. Its totient is φ = 133210009990.

The previous prime is 133210009981. The next prime is 133210009993. The reversal of 133210009991 is 199900012331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133210009991 is a prime.

Together with 133210009993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133210009993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66605004995 + 66605004996.

It is an arithmetic number, because the mean of its divisors is an integer number (66605004996).

Almost surely, 2^133210009991 is an apocalyptic number.

133210009991 is a deficient number, since it is larger than the sum of its proper divisors (1).

133210009991 is an equidigital number, since it uses as much as digits as its factorization.

133210009991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 38.

The spelling of 133210009991 in words is "one hundred thirty-three billion, two hundred ten million, nine thousand, nine hundred ninety-one".