221000001110021 has 16 divisors (see below), whose sum is σ = 261290946042240. Its totient is φ = 182889443056320.

The previous prime is 221000001110011. The next prime is 221000001110059. The reversal of 221000001110021 is 120011100000122.

It is a de Polignac number, because none of the positive numbers 2^k-221000001110021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221000001109984 and 221000001110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000001110011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15921191 + ... + 26372036.

It is an arithmetic number, because the mean of its divisors is an integer number (16330684127640).

Almost surely, 2^{221000001110021} is an apocalyptic number.

It is an amenable number.

221000001110021 is a deficient number, since it is larger than the sum of its proper divisors (40290944932219).

221000001110021 is a wasteful number, since it uses less digits than its factorization.

221000001110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42319004.

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

Adding to 221000001110021 its reverse (120011100000122), we get a palindrome (341011101110143).

The spelling of 221000001110021 in words is "two hundred twenty-one trillion, one million, one hundred ten thousand, twenty-one".