10211443221 has 16 divisors (see below), whose sum is σ = 15565234304. Its totient is φ = 5833257984.

The previous prime is 10211443217. The next prime is 10211443237. The reversal of 10211443221 is 12234411201.

It is not a de Polignac number, because 10211443221 - 2² = 10211443217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211443241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8020 + ... + 143133.

It is an arithmetic number, because the mean of its divisors is an integer number (972827144).

Almost surely, 2^10211443221 is an apocalyptic number.

It is an amenable number.

10211443221 is a deficient number, since it is larger than the sum of its proper divisors (5353791083).

10211443221 is a wasteful number, since it uses less digits than its factorization.

10211443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154380.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 10211443221 its reverse (12234411201), we get a palindrome (22445854422).

The spelling of 10211443221 in words is "ten billion, two hundred eleven million, four hundred forty-three thousand, two hundred twenty-one".