221010112021 has 16 divisors (see below), whose sum is σ = 238083039040. Its totient is φ = 204482517120.

The previous prime is 221010112019. The next prime is 221010112039. The reversal of 221010112021 is 120211010122.

It is a cyclic number.

It is not a de Polignac number, because 221010112021 - 2¹ = 221010112019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221010111992 and 221010112010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010112091) 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, 9656131 + ... + 9678991.

It is an arithmetic number, because the mean of its divisors is an integer number (14880189940).

Almost surely, 2^221010112021 is an apocalyptic number.

It is an amenable number.

221010112021 is a deficient number, since it is larger than the sum of its proper divisors (17072927019).

221010112021 is a wasteful number, since it uses less digits than its factorization.

221010112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34756.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221010112021 its reverse (120211010122), we get a palindrome (341221122143).

The spelling of 221010112021 in words is "two hundred twenty-one billion, ten million, one hundred twelve thousand, twenty-one".