12662155126621 has 64 divisors (see below), whose sum is σ = 17834884300800. Its totient is φ = 8669732601600.

The previous prime is 12662155126589. The next prime is 12662155126631.

12662155126621 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12662155126621 - 2⁵ = 12662155126589 is a prime.

It is a super-2 number, since 2×12662155126621² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12662155126631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1010701 + ... + 5132818.

It is an arithmetic number, because the mean of its divisors is an integer number (278670067200).

Almost surely, 2^{12662155126621} is an apocalyptic number.

12662155126621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12662155126621 is a deficient number, since it is larger than the sum of its proper divisors (5172729174179).

12662155126621 is a wasteful number, since it uses less digits than its factorization.

12662155126621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6143650.

The product of its digits is 518400, while the sum is 46.

The spelling of 12662155126621 in words is "twelve trillion, six hundred sixty-two billion, one hundred fifty-five million, one hundred twenty-six thousand, six hundred twenty-one".