222221121000020 has 48 divisors (see below), whose sum is σ = 494121376405440. Its totient is φ = 83658670139904.

The previous prime is 222221120999989. The next prime is 222221121000029. The reversal of 222221121000020 is 20000121122222.

It is a happy number.

222221121000020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221121000029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23419307 + ... + 31510413.

It is an arithmetic number, because the mean of its divisors is an integer number (10294195341780).

Almost surely, 2^{222221121000020} is an apocalyptic number.

222221121000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221121000020 is an abundant number, since it is smaller than the sum of its proper divisors (271900255405420).

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

222221121000020 is a wasteful number, since it uses less digits than its factorization.

222221121000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8171912 (or 8171910 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222221121000020 its reverse (20000121122222), we get a palindrome (242221242122242).

The spelling of 222221121000020 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty", and thus it is an aban number.