105161103521 has 8 divisors (see below), whose sum is σ = 109180090920. Its totient is φ = 101168299008.

The previous prime is 105161103479. The next prime is 105161103533. The reversal of 105161103521 is 125301161501.

It can be written as a sum of positive squares in 4 ways, for example, as 4605522496 + 100555581025 = 67864^2 + 317105^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105161103521 is a prime.

It is a super-2 number, since 2×105161103521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105161103581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6537536 + ... + 6553601.

It is an arithmetic number, because the mean of its divisors is an integer number (13647511365).

Almost surely, 2^105161103521 is an apocalyptic number.

It is an amenable number.

105161103521 is a deficient number, since it is larger than the sum of its proper divisors (4018987399).

105161103521 is a wasteful number, since it uses less digits than its factorization.

105161103521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13091443.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 105161103521 in words is "one hundred five billion, one hundred sixty-one million, one hundred three thousand, five hundred twenty-one".