221222110011021 has 24 divisors (see below), whose sum is σ = 374099177909184. Its totient is φ = 123329399307840.

The previous prime is 221222110010977. The next prime is 221222110011047. The reversal of 221222110011021 is 120110011222122.

221222110011021 is a `hidden beast` number, since 2 + 212 + 221 + 100 + 110 + 21 = 666.

It is not a de Polignac number, because 221222110011021 - 2⁹ = 221222110010509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221222110010985 and 221222110011003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222110011421) 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, 42822705511 + ... + 42822710676.

It is an arithmetic number, because the mean of its divisors is an integer number (15587465746216).

Almost surely, 2^{221222110011021} is an apocalyptic number.

221222110011021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221222110011021 is a deficient number, since it is larger than the sum of its proper divisors (152877067898163).

221222110011021 is a wasteful number, since it uses less digits than its factorization.

221222110011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85645416241 (or 85645416238 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221222110011021 its reverse (120110011222122), we get a palindrome (341332121233143).

The spelling of 221222110011021 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred ten million, eleven thousand, twenty-one".