221222001112020 has 36 divisors (see below), whose sum is σ = 671040070040340. Its totient is φ = 58992533629824.

The previous prime is 221222001112003. The next prime is 221222001112081. The reversal of 221222001112020 is 20211100222122.

It is a happy number.

221222001112020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 60968580664644 + 160253420447376 = 7808238^2 + 12659124^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221222001111984 and 221222001112002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 614505558465 + ... + 614505558824.

It is an arithmetic number, because the mean of its divisors is an integer number (18640001945565).

Almost surely, 2^{221222001112020} is an apocalyptic number.

221222001112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222001112020 is an abundant number, since it is smaller than the sum of its proper divisors (449818068928320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221222001112020 is a wasteful number, since it uses less digits than its factorization.

221222001112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229011117304 (or 1229011117299 counting only the distinct ones).

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

Adding to 221222001112020 its reverse (20211100222122), we get a palindrome (241433101334142).

The spelling of 221222001112020 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one million, one hundred twelve thousand, twenty".