10000111022021 has 4 divisors (see below), whose sum is σ = 10088607579852. Its totient is φ = 9911614464192.

The previous prime is 10000111021993. The next prime is 10000111022047. The reversal of 10000111022021 is 12022011100001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5607963916996 + 4392147105025 = 2368114^2 + 2095745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10000111022021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10000111021993 and 10000111022011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000111022081) 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 3 ways as a sum of consecutive naturals, for example, 44248278746 + ... + 44248278971.

It is an arithmetic number, because the mean of its divisors is an integer number (2522151894963).

Almost surely, 2^{10000111022021} is an apocalyptic number.

It is an amenable number.

10000111022021 is a deficient number, since it is larger than the sum of its proper divisors (88496557831).

10000111022021 is an equidigital number, since it uses as much as digits as its factorization.

10000111022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88496557830.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10000111022021 its reverse (12022011100001), we get a palindrome (22022122122022).

The spelling of 10000111022021 in words is "ten trillion, one hundred eleven million, twenty-two thousand, twenty-one".