221022212002221 has 32 divisors (see below), whose sum is σ = 341646650081280. Its totient is φ = 124481724580224.

The previous prime is 221022212002133. The next prime is 221022212002271. The reversal of 221022212002221 is 122200212220122.

221022212002221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221022212002221 - 2⁹ = 221022212001709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022212002271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47890005 + ... + 52301978.

It is an arithmetic number, because the mean of its divisors is an integer number (10676457815040).

Almost surely, 2^{221022212002221} is an apocalyptic number.

221022212002221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221022212002221 is a deficient number, since it is larger than the sum of its proper divisors (120624438079059).

221022212002221 is a wasteful number, since it uses less digits than its factorization.

221022212002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100193505.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221022212002221 its reverse (122200212220122), we get a palindrome (343222424222343).

The spelling of 221022212002221 in words is "two hundred twenty-one trillion, twenty-two billion, two hundred twelve million, two thousand, two hundred twenty-one".