100601121565 has 32 divisors (see below), whose sum is σ = 141064335360. Its totient is φ = 67438453824.

The previous prime is 100601121563. The next prime is 100601121571. The reversal of 100601121565 is 565121106001.

It is a happy number.

It is not a de Polignac number, because 100601121565 - 2¹ = 100601121563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100601121563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1417906 + ... + 1487164.

It is an arithmetic number, because the mean of its divisors is an integer number (4408260480).

Almost surely, 2^100601121565 is an apocalyptic number.

It is an amenable number.

100601121565 is a deficient number, since it is larger than the sum of its proper divisors (40463213795).

100601121565 is an equidigital number, since it uses as much as digits as its factorization.

100601121565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70201.

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

Adding to 100601121565 its reverse (565121106001), we get a palindrome (665722227566).

The spelling of 100601121565 in words is "one hundred billion, six hundred one million, one hundred twenty-one thousand, five hundred sixty-five".