2011110100021 has 4 divisors (see below), whose sum is σ = 2193938290944. Its totient is φ = 1828281909100.

The previous prime is 2011110100009. The next prime is 2011110100127. The reversal of 2011110100021 is 1200010111102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2011110100021 - 2¹¹ = 2011110097973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011110099980 and 2011110100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011110400021) 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, 91414095445 + ... + 91414095466.

It is an arithmetic number, because the mean of its divisors is an integer number (548484572736).

Almost surely, 2^{2011110100021} is an apocalyptic number.

It is an amenable number.

2011110100021 is a deficient number, since it is larger than the sum of its proper divisors (182828190923).

2011110100021 is a wasteful number, since it uses less digits than its factorization.

2011110100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182828190922.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 2011110100021 its reverse (1200010111102), we get a palindrome (3211120211123).

The spelling of 2011110100021 in words is "two trillion, eleven billion, one hundred ten million, one hundred thousand, twenty-one".