21130331535091 has 2 divisors, whose sum is σ = 21130331535092. Its totient is φ = 21130331535090.

The previous prime is 21130331535073. The next prime is 21130331535211. The reversal of 21130331535091 is 19053513303112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21130331535091 - 2⁹ = 21130331534579 is a prime.

It is a super-2 number, since 2×21130331535091² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21130331535091.

It is not a weakly prime, because it can be changed into another prime (21130331538091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565165767545 + 10565165767546.

It is an arithmetic number, because the mean of its divisors is an integer number (10565165767546).

Almost surely, 2^{21130331535091} is an apocalyptic number.

21130331535091 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130331535091 is an equidigital number, since it uses as much as digits as its factorization.

21130331535091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36450, while the sum is 37.

The spelling of 21130331535091 in words is "twenty-one trillion, one hundred thirty billion, three hundred thirty-one million, five hundred thirty-five thousand, ninety-one".