21331191041 has 2 divisors, whose sum is σ = 21331191042. Its totient is φ = 21331191040.

The previous prime is 21331191029. The next prime is 21331191053. The reversal of 21331191041 is 14019113312.

It is a balanced prime because it is at equal distance from previous prime (21331191029) and next prime (21331191053).

It can be written as a sum of positive squares in only one way, i.e., 14761278016 + 6569913025 = 121496^2 + 81055^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331191041 - 2⁶ = 21331190977 is a prime.

It is a super-2 number, since 2×21331191041² (a number of 21 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 21331191041.

It is not a weakly prime, because it can be changed into another prime (21331191341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665595520 + 10665595521.

It is an arithmetic number, because the mean of its divisors is an integer number (10665595521).

Almost surely, 2^21331191041 is an apocalyptic number.

It is an amenable number.

21331191041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331191041 is an equidigital number, since it uses as much as digits as its factorization.

21331191041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 21331191041 in words is "twenty-one billion, three hundred thirty-one million, one hundred ninety-one thousand, forty-one".