2110011110021 has 4 divisors (see below), whose sum is σ = 2110081098444. Its totient is φ = 2109941121600.

The previous prime is 2110011110003. The next prime is 2110011110029. The reversal of 2110011110021 is 1200111100112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1668517307521 + 441493802500 = 1291711^2 + 664450^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110011110021 - 2⁶ = 2110011109957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2110011109984 and 2110011110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2110011110029) 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, 34948970 + ... + 35009291.

It is an arithmetic number, because the mean of its divisors is an integer number (527520274611).

Almost surely, 2^{2110011110021} is an apocalyptic number.

It is an amenable number.

2110011110021 is a deficient number, since it is larger than the sum of its proper divisors (69988423).

2110011110021 is an equidigital number, since it uses as much as digits as its factorization.

2110011110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69988422.

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

Adding to 2110011110021 its reverse (1200111100112), we get a palindrome (3310122210133).

Subtracting from 2110011110021 its reverse (1200111100112), we obtain a palindrome (909900009909).

The spelling of 2110011110021 in words is "two trillion, one hundred ten billion, eleven million, one hundred ten thousand, twenty-one".