9811102421 has 4 divisors (see below), whose sum is σ = 10050397644. Its totient is φ = 9571807200.

The previous prime is 9811102417. The next prime is 9811102423. The reversal of 9811102421 is 1242011189.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3610327396 + 6200775025 = 60086^2 + 78745^2 .

It is a cyclic number.

It is not a de Polignac number, because 9811102421 - 2² = 9811102417 is a prime.

It is a super-2 number, since 2×9811102421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9811102423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119647550 + ... + 119647631.

It is an arithmetic number, because the mean of its divisors is an integer number (2512599411).

Almost surely, 2^9811102421 is an apocalyptic number.

It is an amenable number.

9811102421 is a deficient number, since it is larger than the sum of its proper divisors (239295223).

9811102421 is a wasteful number, since it uses less digits than its factorization.

9811102421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239295222.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 9811102421 is about 99051.0091871860. The cubic root of 9811102421 is about 2140.7827820974.

The spelling of 9811102421 in words is "nine billion, eight hundred eleven million, one hundred two thousand, four hundred twenty-one".