221002220022021 has 8 divisors (see below), whose sum is σ = 327410696328960. Its totient is φ = 147334813347996.

The previous prime is 221002220022013. The next prime is 221002220022043. The reversal of 221002220022021 is 120220022200122.

221002220022021 is a `hidden beast` number, since 221 + 0 + 0 + 2 + 2 + 200 + 220 + 21 = 666.

It is not a de Polignac number, because 221002220022021 - 2³ = 221002220022013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221002220021985 and 221002220022003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002220002021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4092633704085 + ... + 4092633704138.

It is an arithmetic number, because the mean of its divisors is an integer number (40926337041120).

Almost surely, 2^{221002220022021} is an apocalyptic number.

It is an amenable number.

221002220022021 is a deficient number, since it is larger than the sum of its proper divisors (106408476306939).

221002220022021 is an equidigital number, since it uses as much as digits as its factorization.

221002220022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8185267408232 (or 8185267408226 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221002220022021 its reverse (120220022200122), we get a palindrome (341222242222143).

The spelling of 221002220022021 in words is "two hundred twenty-one trillion, two billion, two hundred twenty million, twenty-two thousand, twenty-one".