12261466416221 has 16 divisors (see below), whose sum is σ = 13388365756608. Its totient is φ = 11136605500800.

The previous prime is 12261466416197. The next prime is 12261466416253.

12261466416221 is nontrivially palindromic in base 10.

12261466416221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12261466416221 - 2¹⁰ = 12261466415197 is a prime.

It is a super-2 number, since 2×12261466416221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261466416821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178988786 + ... + 179057276.

It is an arithmetic number, because the mean of its divisors is an integer number (836772859788).

Almost surely, 2^{12261466416221} is an apocalyptic number.

12261466416221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12261466416221 is a deficient number, since it is larger than the sum of its proper divisors (1126899340387).

12261466416221 is a wasteful number, since it uses less digits than its factorization.

12261466416221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83132.

The product of its digits is 331776, while the sum is 44.

The spelling of 12261466416221 in words is "twelve trillion, two hundred sixty-one billion, four hundred sixty-six million, four hundred sixteen thousand, two hundred twenty-one".