105121707215 has 16 divisors (see below), whose sum is σ = 144891379200. Its totient is φ = 71721223200.

The previous prime is 105121707211. The next prime is 105121707217. The reversal of 105121707215 is 512707121501.

It is not a de Polignac number, because 105121707215 - 2² = 105121707211 is a prime.

It is a super-2 number, since 2×105121707215² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105121707211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7539461 + ... + 7553390.

It is an arithmetic number, because the mean of its divisors is an integer number (9055711200).

Almost surely, 2^105121707215 is an apocalyptic number.

105121707215 is a deficient number, since it is larger than the sum of its proper divisors (39769671985).

105121707215 is a wasteful number, since it uses less digits than its factorization.

105121707215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15093062.

The product of its (nonzero) digits is 4900, while the sum is 32.

Adding to 105121707215 its reverse (512707121501), we get a palindrome (617828828716).

The spelling of 105121707215 in words is "one hundred five billion, one hundred twenty-one million, seven hundred seven thousand, two hundred fifteen".