21411666611412 has 144 divisors (see below), whose sum is σ = 65587013392320. Its totient is φ = 5369696908800.

The previous prime is 21411666611411. The next prime is 21411666611431.

It is a happy number.

21411666611412 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411666611411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56888289 + ... + 57263432.

It is an arithmetic number, because the mean of its divisors is an integer number (455465370780).

Almost surely, 2^{21411666611412} is an apocalyptic number.

21411666611412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21411666611412 is an abundant number, since it is smaller than the sum of its proper divisors (44175346780908).

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

21411666611412 is a wasteful number, since it uses less digits than its factorization.

21411666611412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114151782 (or 114151773 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

It can be divided in two parts, 2141166 and 6611412, that added together give a palindrome (8752578).

The spelling of 21411666611412 in words is "twenty-one trillion, four hundred eleven billion, six hundred sixty-six million, six hundred eleven thousand, four hundred twelve".