120111040665 has 96 divisors (see below), whose sum is σ = 259672608000. Its totient is φ = 49895516160.

The previous prime is 120111040589. The next prime is 120111040681. The reversal of 120111040665 is 566040111021.

It is not a de Polignac number, because 120111040665 - 2¹⁶ = 120110975129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10559101 + ... + 10570469.

It is an arithmetic number, because the mean of its divisors is an integer number (2704923000).

Almost surely, 2^120111040665 is an apocalyptic number.

120111040665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120111040665 is an abundant number, since it is smaller than the sum of its proper divisors (139561567335).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120111040665 is a wasteful number, since it uses less digits than its factorization.

120111040665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14447 (or 14444 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 120111040665 its reverse (566040111021), we get a palindrome (686151151686).

It can be divided in two parts, 12011 and 1040665, that added together give a square (1052676 = 1026²).

The spelling of 120111040665 in words is "one hundred twenty billion, one hundred eleven million, forty thousand, six hundred sixty-five".