10111111221021 has 8 divisors (see below), whose sum is σ = 13493486513760. Its totient is φ = 6734738371152.

The previous prime is 10111111221011. The next prime is 10111111221041. The reversal of 10111111221021 is 12012211111101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10111111221021 - 2¹⁵ = 10111111188253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111111221011) 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, 1500606786 + ... + 1500613523.

It is an arithmetic number, because the mean of its divisors is an integer number (1686685814220).

Almost surely, 2^{10111111221021} is an apocalyptic number.

It is an amenable number.

10111111221021 is a deficient number, since it is larger than the sum of its proper divisors (3382375292739).

10111111221021 is a wasteful number, since it uses less digits than its factorization.

10111111221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001221435.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 10111111221021 its reverse (12012211111101), we get a palindrome (22123322332122).

The spelling of 10111111221021 in words is "ten trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty-one thousand, twenty-one".