133252720891 has 2 divisors, whose sum is σ = 133252720892. Its totient is φ = 133252720890.

The previous prime is 133252720889. The next prime is 133252720897. The reversal of 133252720891 is 198027252331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133252720891 - 2¹ = 133252720889 is a prime.

Together with 133252720889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (133252720897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66626360445 + 66626360446.

It is an arithmetic number, because the mean of its divisors is an integer number (66626360446).

Almost surely, 2^133252720891 is an apocalyptic number.

133252720891 is a deficient number, since it is larger than the sum of its proper divisors (1).

133252720891 is an equidigital number, since it uses as much as digits as its factorization.

133252720891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 133252720891 in words is "one hundred thirty-three billion, two hundred fifty-two million, seven hundred twenty thousand, eight hundred ninety-one".