10210220221 has 4 divisors (see below), whose sum is σ = 10248176700. Its totient is φ = 10172263744.

The previous prime is 10210220173. The next prime is 10210220227. The reversal of 10210220221 is 12202201201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6248902500 + 3961317721 = 79050^2 + 62939^2 .

It is a cyclic number.

It is not a de Polignac number, because 10210220221 - 2³¹ = 8062736573 is a prime.

It is a super-2 number, since 2×10210220221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10210220227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18977836 + ... + 18978373.

It is an arithmetic number, because the mean of its divisors is an integer number (2562044175).

Almost surely, 2^10210220221 is an apocalyptic number.

It is an amenable number.

10210220221 is a deficient number, since it is larger than the sum of its proper divisors (37956479).

10210220221 is an equidigital number, since it uses as much as digits as its factorization.

10210220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37956478.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10210220221 its reverse (12202201201), we get a palindrome (22412421422).

The spelling of 10210220221 in words is "ten billion, two hundred ten million, two hundred twenty thousand, two hundred twenty-one".