10201001221 has 4 divisors (see below), whose sum is σ = 10218866944. Its totient is φ = 10183135500.

The previous prime is 10201001201. The next prime is 10201001243. The reversal of 10201001221 is 12210010201.

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: 12210010201 = 73679 ⋅165719.

It is a cyclic number.

It is not a de Polignac number, because 10201001221 - 2¹³ = 10200993029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10201001198 and 10201001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201001201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8932005 + ... + 8933146.

It is an arithmetic number, because the mean of its divisors is an integer number (2554716736).

Almost surely, 2^10201001221 is an apocalyptic number.

It is an amenable number.

10201001221 is a deficient number, since it is larger than the sum of its proper divisors (17865723).

10201001221 is an equidigital number, since it uses as much as digits as its factorization.

10201001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17865722.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10201001221 its reverse (12210010201), we get a palindrome (22411011422).

The spelling of 10201001221 in words is "ten billion, two hundred one million, one thousand, two hundred twenty-one".