10656421631321 has 8 divisors (see below), whose sum is σ = 10676657628000. Its totient is φ = 10636204809760.

The previous prime is 10656421631309. The next prime is 10656421631327. The reversal of 10656421631321 is 12313612465601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10656421631321 - 2¹⁰ = 10656421630297 is a prime.

It is a super-2 number, since 2×10656421631321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10656421631327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3680996 + ... + 5904453.

It is an arithmetic number, because the mean of its divisors is an integer number (1334582203500).

Almost surely, 2^{10656421631321} is an apocalyptic number.

It is an amenable number.

10656421631321 is a deficient number, since it is larger than the sum of its proper divisors (20235996679).

10656421631321 is a wasteful number, since it uses less digits than its factorization.

10656421631321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9587559.

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

The spelling of 10656421631321 in words is "ten trillion, six hundred fifty-six billion, four hundred twenty-one million, six hundred thirty-one thousand, three hundred twenty-one".