2210111000021 has 16 divisors (see below), whose sum is σ = 2345269172400. Its totient is φ = 2075528491008.

The previous prime is 2210111000017. The next prime is 2210111000087. The reversal of 2210111000021 is 1200001110122.

It can be written as a sum of positive squares in 8 ways, for example, as 55201502500 + 2154909497521 = 234950^2 + 1467961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210111000021 - 2² = 2210111000017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210110999966 and 2210111000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210111000011) 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, 22285481 + ... + 22384433.

It is an arithmetic number, because the mean of its divisors is an integer number (146579323275).

Almost surely, 2^{2210111000021} is an apocalyptic number.

It is an amenable number.

2210111000021 is a deficient number, since it is larger than the sum of its proper divisors (135158172379).

2210111000021 is a wasteful number, since it uses less digits than its factorization.

2210111000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101848.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2210111000021 its reverse (1200001110122), we get a palindrome (3410112110143).

The spelling of 2210111000021 in words is "two trillion, two hundred ten billion, one hundred eleven million, twenty-one", and thus it is an aban number.