221000112222021 has 24 divisors (see below), whose sum is σ = 348243755524704. Its totient is φ = 133939017934560.

The previous prime is 221000112222011. The next prime is 221000112222023. The reversal of 221000112222021 is 120222211000122.

It is a happy number.

It is not a de Polignac number, because 221000112222021 - 2²⁷ = 220999978004293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221000112221985 and 221000112222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000112222023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27649015 + ... + 34734251.

It is an arithmetic number, because the mean of its divisors is an integer number (14510156480196).

Almost surely, 2^{221000112222021} is an apocalyptic number.

It is an amenable number.

221000112222021 is a deficient number, since it is larger than the sum of its proper divisors (127243643302683).

221000112222021 is a wasteful number, since it uses less digits than its factorization.

221000112222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400321 (or 7400318 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221000112222021 its reverse (120222211000122), we get a palindrome (341222323222143).

The spelling of 221000112222021 in words is "two hundred twenty-one trillion, one hundred twelve million, two hundred twenty-two thousand, twenty-one".