10212721601 has 4 divisors (see below), whose sum is σ = 10257711792. Its totient is φ = 10167731412.

The previous prime is 10212721573. The next prime is 10212721621. The reversal of 10212721601 is 10612721201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10612721201 = 54629 ⋅194269.

It is a cyclic number.

It is not a de Polignac number, because 10212721601 - 2¹⁰ = 10212720577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10212721621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22494755 + ... + 22495208.

It is an arithmetic number, because the mean of its divisors is an integer number (2564427948).

Almost surely, 2^10212721601 is an apocalyptic number.

It is an amenable number.

10212721601 is a deficient number, since it is larger than the sum of its proper divisors (44990191).

10212721601 is an equidigital number, since it uses as much as digits as its factorization.

10212721601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44990190.

The product of its (nonzero) digits is 336, while the sum is 23.

The spelling of 10212721601 in words is "ten billion, two hundred twelve million, seven hundred twenty-one thousand, six hundred one".