10861948021 has 2 divisors, whose sum is σ = 10861948022. Its totient is φ = 10861948020.

The previous prime is 10861948003. The next prime is 10861948037. The reversal of 10861948021 is 12084916801.

10861948021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6266463921 + 4595484100 = 79161^2 + 67790^2 .

It is a cyclic number.

It is not a de Polignac number, because 10861948021 - 2⁷ = 10861947893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10861948921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5430974010 + 5430974011.

It is an arithmetic number, because the mean of its divisors is an integer number (5430974011).

Almost surely, 2^10861948021 is an apocalyptic number.

It is an amenable number.

10861948021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10861948021 is an equidigital number, since it uses as much as digits as its factorization.

10861948021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 40.

The spelling of 10861948021 in words is "ten billion, eight hundred sixty-one million, nine hundred forty-eight thousand, twenty-one".