133121233463531 has 2 divisors, whose sum is σ = 133121233463532. Its totient is φ = 133121233463530.

The previous prime is 133121233463501. The next prime is 133121233463587. The reversal of 133121233463531 is 135364332121331.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133121233463531 is a prime.

It is a super-2 number, since 2×133121233463531² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133121233463501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66560616731765 + 66560616731766.

It is an arithmetic number, because the mean of its divisors is an integer number (66560616731766).

Almost surely, 2^{133121233463531} is an apocalyptic number.

133121233463531 is a deficient number, since it is larger than the sum of its proper divisors (1).

133121233463531 is an equidigital number, since it uses as much as digits as its factorization.

133121233463531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 41.

Adding to 133121233463531 its reverse (135364332121331), we get a palindrome (268485565584862).

The spelling of 133121233463531 in words is "one hundred thirty-three trillion, one hundred twenty-one billion, two hundred thirty-three million, four hundred sixty-three thousand, five hundred thirty-one".