10001111202021 has 32 divisors (see below), whose sum is σ = 14381857566720. Its totient is φ = 6166625351744.

The previous prime is 10001111202011. The next prime is 10001111202023. The reversal of 10001111202021 is 12020211110001.

It is not a de Polignac number, because 10001111202021 - 2¹⁷ = 10001111070949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10001111201988 and 10001111202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001111202023) 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 31 ways as a sum of consecutive naturals, for example, 18308586 + ... + 18846923.

It is an arithmetic number, because the mean of its divisors is an integer number (449433048960).

Almost surely, 2^{10001111202021} is an apocalyptic number.

It is an amenable number.

10001111202021 is a deficient number, since it is larger than the sum of its proper divisors (4380746364699).

10001111202021 is a wasteful number, since it uses less digits than its factorization.

10001111202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37155665.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10001111202021 its reverse (12020211110001), we get a palindrome (22021322312022).

The spelling of 10001111202021 in words is "ten trillion, one billion, one hundred eleven million, two hundred two thousand, twenty-one".