10261166421 has 16 divisors (see below), whose sum is σ = 14928565248. Its totient is φ = 6217542000.

The previous prime is 10261166417. The next prime is 10261166491. The reversal of 10261166421 is 12466116201.

10261166421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10261166421 - 2² = 10261166417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10261166491) 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 in 15 ways as a sum of consecutive naturals, for example, 133396 + ... + 195746.

It is an arithmetic number, because the mean of its divisors is an integer number (933035328).

Almost surely, 2^10261166421 is an apocalyptic number.

10261166421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10261166421 is a deficient number, since it is larger than the sum of its proper divisors (4667398827).

10261166421 is a wasteful number, since it uses less digits than its factorization.

10261166421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67352.

The product of its (nonzero) digits is 3456, while the sum is 30.

The spelling of 10261166421 in words is "ten billion, two hundred sixty-one million, one hundred sixty-six thousand, four hundred twenty-one".