10020011221 has 4 divisors (see below), whose sum is σ = 10930921344. Its totient is φ = 9109101100.

The previous prime is 10020011201. The next prime is 10020011233. The reversal of 10020011221 is 12211002001.

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: 12211002001 = 11 ⋅1110091091.

It is not a de Polignac number, because 10020011221 - 2¹¹ = 10020009173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10020011198 and 10020011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020011201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455455045 + ... + 455455066.

It is an arithmetic number, because the mean of its divisors is an integer number (2732730336).

Almost surely, 2^10020011221 is an apocalyptic number.

10020011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10020011221 is a deficient number, since it is larger than the sum of its proper divisors (910910123).

10020011221 is an equidigital number, since it uses as much as digits as its factorization.

10020011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910910122.

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

Adding to 10020011221 its reverse (12211002001), we get a palindrome (22231013222).

It can be divided in two parts, 1002001 and 1221, that multiplied together give a palindrome (1223443221).

The spelling of 10020011221 in words is "ten billion, twenty million, eleven thousand, two hundred twenty-one".