881186121961 has 2 divisors, whose sum is σ = 881186121962. Its totient is φ = 881186121960.

The previous prime is 881186121913. The next prime is 881186121967. The reversal of 881186121961 is 169121681188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671344254736 + 209841867225 = 819356^2 + 458085^2 .

It is a cyclic number.

It is not a de Polignac number, because 881186121961 - 2¹⁵ = 881186089193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 881186121899 and 881186121908.

It is not a weakly prime, because it can be changed into another prime (881186121967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440593060980 + 440593060981.

It is an arithmetic number, because the mean of its divisors is an integer number (440593060981).

Almost surely, 2^881186121961 is an apocalyptic number.

It is an amenable number.

881186121961 is a deficient number, since it is larger than the sum of its proper divisors (1).

881186121961 is an equidigital number, since it uses as much as digits as its factorization.

881186121961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 52.

The spelling of 881186121961 in words is "eight hundred eighty-one billion, one hundred eighty-six million, one hundred twenty-one thousand, nine hundred sixty-one".