10961863421 has 4 divisors (see below), whose sum is σ = 10962693852. Its totient is φ = 10961032992.

The previous prime is 10961863399. The next prime is 10961863427. The reversal of 10961863421 is 12436816901.

10961863421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12436816901 = 101 ⋅123136801.

It can be written as a sum of positive squares in 2 ways, for example, as 7768483321 + 3193380100 = 88139^2 + 56510^2 .

It is a cyclic number.

It is not a de Polignac number, because 10961863421 - 2¹⁴ = 10961847037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10961863427) 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 in 3 ways as a sum of consecutive naturals, for example, 395090 + ... + 421923.

It is an arithmetic number, because the mean of its divisors is an integer number (2740673463).

Almost surely, 2^10961863421 is an apocalyptic number.

It is an amenable number.

10961863421 is a deficient number, since it is larger than the sum of its proper divisors (830431).

10961863421 is an equidigital number, since it uses as much as digits as its factorization.

10961863421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830430.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 10961863421 in words is "ten billion, nine hundred sixty-one million, eight hundred sixty-three thousand, four hundred twenty-one".