21118285171412 has 96 divisors (see below), whose sum is σ = 44490025367424. Its totient is φ = 8642167603200.

The previous prime is 21118285171267. The next prime is 21118285171429. The reversal of 21118285171412 is 21417158281112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80943323 + ... + 81203805.

It is an arithmetic number, because the mean of its divisors is an integer number (463437764244).

Almost surely, 2^{21118285171412} is an apocalyptic number.

21118285171412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21118285171412 is an abundant number, since it is smaller than the sum of its proper divisors (23371740196012).

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

21118285171412 is a wasteful number, since it uses less digits than its factorization.

21118285171412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264009 (or 264007 counting only the distinct ones).

The product of its digits is 71680, while the sum is 44.

The spelling of 21118285171412 in words is "twenty-one trillion, one hundred eighteen billion, two hundred eighty-five million, one hundred seventy-one thousand, four hundred twelve".