1010111111221 has 8 divisors (see below), whose sum is σ = 1013526157824. Its totient is φ = 1006701381840.

The previous prime is 1010111111201. The next prime is 1010111111227. The reversal of 1010111111221 is 1221111110101.

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 1010111111221 - 2¹¹ = 1010111109173 is a prime.

It is a super-2 number, since 2×1010111111221² (a number of 25 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 (1010111111227) 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 7 ways as a sum of consecutive naturals, for example, 948541 + ... + 1708786.

It is an arithmetic number, because the mean of its divisors is an integer number (126690769728).

Almost surely, 2^{1010111111221} is an apocalyptic number.

It is an amenable number.

1010111111221 is a deficient number, since it is larger than the sum of its proper divisors (3415046603).

1010111111221 is an equidigital number, since it uses as much as digits as its factorization.

1010111111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2658611.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1010111111221 its reverse (1221111110101), we get a palindrome (2231222221322).

The spelling of 1010111111221 in words is "one trillion, ten billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty-one".