20211100211011 has 16 divisors (see below), whose sum is σ = 21348640576800. Its totient is φ = 19080973087488.

The previous prime is 20211100210997. The next prime is 20211100211041. The reversal of 20211100211011 is 11011200111202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20211100211011 - 2³⁵ = 20176740472643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211100210982 and 20211100211000.

It is not an unprimeable number, because it can be changed into a prime (20211100211041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21404985 + ... + 22329253.

It is an arithmetic number, because the mean of its divisors is an integer number (1334290036050).

Almost surely, 2^{20211100211011} is an apocalyptic number.

20211100211011 is a deficient number, since it is larger than the sum of its proper divisors (1137540365789).

20211100211011 is a wasteful number, since it uses less digits than its factorization.

20211100211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928278.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20211100211011 its reverse (11011200111202), we get a palindrome (31222300322213).

The spelling of 20211100211011 in words is "twenty trillion, two hundred eleven billion, one hundred million, two hundred eleven thousand, eleven".