10210001221 has 8 divisors (see below), whose sum is σ = 11784104064. Its totient is φ = 8664781200.

The previous prime is 10210001201. The next prime is 10210001237. The reversal of 10210001221 is 12210001201.

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

It is a cyclic number.

It is not a de Polignac number, because 10210001221 - 2²³ = 10201612613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10210001198 and 10210001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10210001201) 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, 7219945 + ... + 7221358.

It is an arithmetic number, because the mean of its divisors is an integer number (1473013008).

Almost surely, 2^10210001221 is an apocalyptic number.

It is an amenable number.

10210001221 is a deficient number, since it is larger than the sum of its proper divisors (1574102843).

10210001221 is a wasteful number, since it uses less digits than its factorization.

10210001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14441411.

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

Adding to 10210001221 its reverse (12210001201), we get a palindrome (22420002422).

The spelling of 10210001221 in words is "ten billion, two hundred ten million, one thousand, two hundred twenty-one".