4121000520165 has 32 divisors (see below), whose sum is σ = 7401751244160. Its totient is φ = 2175208515072.

The previous prime is 4121000520139. The next prime is 4121000520173. The reversal of 4121000520165 is 5610250001214.

4121000520165 is a `hidden beast` number, since 4 + 121 + 0 + 0 + 0 + 520 + 16 + 5 = 666.

It is not a de Polignac number, because 4121000520165 - 2⁶ = 4121000520101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157337059 + ... + 157363248.

It is an arithmetic number, because the mean of its divisors is an integer number (231304726380).

Almost surely, 2^{4121000520165} is an apocalyptic number.

4121000520165 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4121000520165 is a deficient number, since it is larger than the sum of its proper divisors (3280750723995).

4121000520165 is a wasteful number, since it uses less digits than its factorization.

4121000520165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314700418 (or 314700412 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 4121000520165 its reverse (5610250001214), we get a palindrome (9731250521379).

The spelling of 4121000520165 in words is "four trillion, one hundred twenty-one billion, five hundred twenty thousand, one hundred sixty-five".