10505121166 has 8 divisors (see below), whose sum is σ = 16587033480. Its totient is φ = 4976110008.

The previous prime is 10505121119. The next prime is 10505121169. The reversal of 10505121166 is 66112150501.

It is a happy number.

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

It is a super-2 number, since 2×10505121166² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10505121169) 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, 138225241 + ... + 138225316.

It is an arithmetic number, because the mean of its divisors is an integer number (2073379185).

Almost surely, 2^10505121166 is an apocalyptic number.

10505121166 is a deficient number, since it is larger than the sum of its proper divisors (6081912314).

10505121166 is a wasteful number, since it uses less digits than its factorization.

10505121166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276450578.

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 10505121166 its reverse (66112150501), we get a palindrome (76617271667).

The spelling of 10505121166 in words is "ten billion, five hundred five million, one hundred twenty-one thousand, one hundred sixty-six".