2111100021011 has 4 divisors (see below), whose sum is σ = 2111103640632. Its totient is φ = 2111096401392.

The previous prime is 2111100020977. The next prime is 2111100021029. The reversal of 2111100021011 is 1101200011112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111100021011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111100020983 and 2111100021001.

It is not an unprimeable number, because it can be changed into a prime (2111100021031) 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, 713645 + ... + 2175198.

It is an arithmetic number, because the mean of its divisors is an integer number (527775910158).

Almost surely, 2^{2111100021011} is an apocalyptic number.

2111100021011 is a deficient number, since it is larger than the sum of its proper divisors (3619621).

2111100021011 is an equidigital number, since it uses as much as digits as its factorization.

2111100021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619620.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 2111100021011 its reverse (1101200011112), we get a palindrome (3212300032123).

The spelling of 2111100021011 in words is "two trillion, one hundred eleven billion, one hundred million, twenty-one thousand, eleven".