10021111022221 has 64 divisors (see below), whose sum is σ = 11768861744640. Its totient is φ = 8460386288640.

The previous prime is 10021111022203. The next prime is 10021111022231. The reversal of 10021111022221 is 12222011112001.

It is not a de Polignac number, because 10021111022221 - 2⁵ = 10021111022189 is a prime.

It is a super-2 number, since 2×10021111022221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10021111022195 and 10021111022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021111022231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 105319150 + ... + 105414256.

It is an arithmetic number, because the mean of its divisors is an integer number (183888464760).

Almost surely, 2^{10021111022221} is an apocalyptic number.

It is an amenable number.

10021111022221 is a deficient number, since it is larger than the sum of its proper divisors (1747750722419).

10021111022221 is a wasteful number, since it uses less digits than its factorization.

10021111022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95366.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10021111022221 its reverse (12222011112001), we get a palindrome (22243122134222).

The spelling of 10021111022221 in words is "ten trillion, twenty-one billion, one hundred eleven million, twenty-two thousand, two hundred twenty-one".