1011020222221 has 16 divisors (see below), whose sum is σ = 1028239960384. Its totient is φ = 993865365504.

The previous prime is 1011020222203. The next prime is 1011020222297. The reversal of 1011020222221 is 1222220201101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1011020222221 - 2¹⁵ = 1011020189453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011020222195 and 1011020222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011020222921) 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 15 ways as a sum of consecutive naturals, for example, 67741666 + ... + 67756588.

It is an arithmetic number, because the mean of its divisors is an integer number (64264997524).

Almost surely, 2^{1011020222221} is an apocalyptic number.

It is an amenable number.

1011020222221 is a deficient number, since it is larger than the sum of its proper divisors (17219738163).

1011020222221 is a wasteful number, since it uses less digits than its factorization.

1011020222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17020.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1011020222221 its reverse (1222220201101), we get a palindrome (2233240423322).

The spelling of 1011020222221 in words is "one trillion, eleven billion, twenty million, two hundred twenty-two thousand, two hundred twenty-one".