11853412121 has 8 divisors (see below), whose sum is σ = 12547318080. Its totient is φ = 11178517392.

The previous prime is 11853412117. The next prime is 11853412139. The reversal of 11853412121 is 12121435811.

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 11853412121 - 2² = 11853412117 is a prime.

It is a super-3 number, since 3×11853412121³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11853412421) 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, 4751525 + ... + 4754018.

It is an arithmetic number, because the mean of its divisors is an integer number (1568414760).

Almost surely, 2^11853412121 is an apocalyptic number.

It is an amenable number.

11853412121 is a deficient number, since it is larger than the sum of its proper divisors (693905959).

11853412121 is an equidigital number, since it uses as much as digits as its factorization.

11853412121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9505615.

The product of its digits is 1920, while the sum is 29.

Adding to 11853412121 its reverse (12121435811), we get a palindrome (23974847932).

The spelling of 11853412121 in words is "eleven billion, eight hundred fifty-three million, four hundred twelve thousand, one hundred twenty-one".