2112211150665 has 64 divisors (see below), whose sum is σ = 4461299804160. Its totient is φ = 826166615040.

The previous prime is 2112211150663. The next prime is 2112211150681. The reversal of 2112211150665 is 5660511122112.

It is a happy number.

It is not a de Polignac number, because 2112211150665 - 2¹ = 2112211150663 is a prime.

It is a super-2 number, since 2×2112211150665² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2112211150663) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53767255 + ... + 53806524.

It is an arithmetic number, because the mean of its divisors is an integer number (69707809440).

Almost surely, 2^{2112211150665} is an apocalyptic number.

It is an amenable number.

2112211150665 is an abundant number, since it is smaller than the sum of its proper divisors (2349088653495).

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

2112211150665 is a wasteful number, since it uses less digits than its factorization.

2112211150665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107573822.

The product of its (nonzero) digits is 7200, while the sum is 33.

Adding to 2112211150665 its reverse (5660511122112), we get a palindrome (7772722272777).

The spelling of 2112211150665 in words is "two trillion, one hundred twelve billion, two hundred eleven million, one hundred fifty thousand, six hundred sixty-five".