12621133406516 has 24 divisors (see below), whose sum is σ = 23386599854856. Its totient is φ = 5939259863040.

The previous prime is 12621133406477. The next prime is 12621133406549. The reversal of 12621133406516 is 61560433112621.

It can be written as a sum of positive squares in 4 ways, for example, as 328718755600 + 12292414650916 = 573340^2 + 3506054^2 .

It is a super-2 number, since 2×12621133406516² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2764886 + ... + 5734706.

It is an arithmetic number, because the mean of its divisors is an integer number (974441660619).

Almost surely, 2^{12621133406516} is an apocalyptic number.

It is an amenable number.

12621133406516 is a deficient number, since it is larger than the sum of its proper divisors (10765466448340).

12621133406516 is a wasteful number, since it uses less digits than its factorization.

12621133406516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032339 (or 3032337 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 12621133406516 in words is "twelve trillion, six hundred twenty-one billion, one hundred thirty-three million, four hundred six thousand, five hundred sixteen".