11865307222121 has 8 divisors (see below), whose sum is σ = 11956381956288. Its totient is φ = 11774240062000.

The previous prime is 11865307222073. The next prime is 11865307222127. The reversal of 11865307222121 is 12122270356811.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11865307222121 - 2⁶ = 11865307222057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11865307222127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1271891 + ... + 5034711.

It is an arithmetic number, because the mean of its divisors is an integer number (1494547744536).

Almost surely, 2^{11865307222121} is an apocalyptic number.

It is an amenable number.

11865307222121 is a deficient number, since it is larger than the sum of its proper divisors (91074734167).

11865307222121 is a wasteful number, since it uses less digits than its factorization.

11865307222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3787023.

The product of its (nonzero) digits is 80640, while the sum is 41.

Adding to 11865307222121 its reverse (12122270356811), we get a palindrome (23987577578932).

The spelling of 11865307222121 in words is "eleven trillion, eight hundred sixty-five billion, three hundred seven million, two hundred twenty-two thousand, one hundred twenty-one".