10221101021 has 8 divisors (see below), whose sum is σ = 10317498840. Its totient is φ = 10124751168.

The previous prime is 10221100993. The next prime is 10221101081. The reversal of 10221101021 is 12010112201.

It can be written as a sum of positive squares in 4 ways, for example, as 5787405625 + 4433695396 = 76075^2 + 66586^2 .

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 10221101021 - 2³⁰ = 9147359197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221100993 and 10221101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221101081) 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, 530855 + ... + 549771.

It is an arithmetic number, because the mean of its divisors is an integer number (1289687355).

Almost surely, 2^10221101021 is an apocalyptic number.

It is an amenable number.

10221101021 is a deficient number, since it is larger than the sum of its proper divisors (96397819).

10221101021 is a wasteful number, since it uses less digits than its factorization.

10221101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23983.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10221101021 its reverse (12010112201), we get a palindrome (22231213222).

The spelling of 10221101021 in words is "ten billion, two hundred twenty-one million, one hundred one thousand, twenty-one".