20211111002011 has 4 divisors (see below), whose sum is σ = 20218357728000. Its totient is φ = 20203864276024.

The previous prime is 20211111001979. The next prime is 20211111002141. The reversal of 20211111002011 is 11020011111202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20211111002011 - 2⁵ = 20211111001979 is a prime.

It is a super-2 number, since 2×20211111002011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211111001982 and 20211111002000.

It is not an unprimeable number, because it can be changed into a prime (20211811002011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3623358811 + ... + 3623364388.

It is an arithmetic number, because the mean of its divisors is an integer number (5054589432000).

Almost surely, 2^{20211111002011} is an apocalyptic number.

20211111002011 is a deficient number, since it is larger than the sum of its proper divisors (7246725989).

20211111002011 is an equidigital number, since it uses as much as digits as its factorization.

20211111002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7246725988.

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

Adding to 20211111002011 its reverse (11020011111202), we get a palindrome (31231122113213).

The spelling of 20211111002011 in words is "twenty trillion, two hundred eleven billion, one hundred eleven million, two thousand, eleven".