222111222221020 has 96 divisors (see below), whose sum is σ = 516970954112256. Its totient is φ = 79484125593600.

The previous prime is 222111222220913. The next prime is 222111222221027. The reversal of 222111222221020 is 20122222111222.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 222111222220982 and 222111222221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222111222221027) 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, 18972186 + ... + 28357825.

It is an arithmetic number, because the mean of its divisors is an integer number (5385114105336).

Almost surely, 2^{222111222221020} is an apocalyptic number.

222111222221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222111222221020 is an abundant number, since it is smaller than the sum of its proper divisors (294859731891236).

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

222111222221020 is a wasteful number, since it uses less digits than its factorization.

222111222221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47330371 (or 47330369 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222111222221020 its reverse (20122222111222), we get a palindrome (242233444332242).

The spelling of 222111222221020 in words is "two hundred twenty-two trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty".