3124660221621 has 12 divisors (see below), whose sum is σ = 4513716194572. Its totient is φ = 2082960000576.

The previous prime is 3124660221619. The next prime is 3124660221637. The reversal of 3124660221621 is 1261220664213.

3124660221621 is a `hidden beast` number, since 3 + 1 + 2 + 4 + 6 + 6 + 0 + 2 + 21 + 621 = 666.

3124660221621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2086034264721 + 1038625956900 = 1444311^2 + 1019130^2 .

It is not a de Polignac number, because 3124660221621 - 2¹ = 3124660221619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3124660921621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12099616 + ... + 12355161.

Almost surely, 2^{3124660221621} is an apocalyptic number.

It is an amenable number.

3124660221621 is a deficient number, since it is larger than the sum of its proper divisors (1389055972951).

3124660221621 is a wasteful number, since it uses less digits than its factorization.

3124660221621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24468980 (or 24468977 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

Adding to 3124660221621 its reverse (1261220664213), we get a palindrome (4385880885834).

The spelling of 3124660221621 in words is "three trillion, one hundred twenty-four billion, six hundred sixty million, two hundred twenty-one thousand, six hundred twenty-one".