10221001221 has 8 divisors (see below), whose sum is σ = 13639241440. Its totient is φ = 6808380912.

The previous prime is 10221001213. The next prime is 10221001223. The reversal of 10221001221 is 12210012201.

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

It is not a de Polignac number, because 10221001221 - 2³ = 10221001213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221001197 and 10221001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221001223) 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, 1400731 + ... + 1408008.

It is an arithmetic number, because the mean of its divisors is an integer number (1704905180).

Almost surely, 2^10221001221 is an apocalyptic number.

It is an amenable number.

10221001221 is a deficient number, since it is larger than the sum of its proper divisors (3418240219).

10221001221 is a wasteful number, since it uses less digits than its factorization.

10221001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809955.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10221001221 its reverse (12210012201), we get a palindrome (22431013422).

The spelling of 10221001221 in words is "ten billion, two hundred twenty-one million, one thousand, two hundred twenty-one".