222120121221020 has 96 divisors (see below), whose sum is σ = 523191655913472. Its totient is φ = 78510150720000.

The previous prime is 222120121220923. The next prime is 222120121221179. The reversal of 222120121221020 is 20122121021222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 222120121220983 and 222120121221001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42989696 + ... + 47878535.

It is an arithmetic number, because the mean of its divisors is an integer number (5449913082432).

Almost surely, 2^{222120121221020} is an apocalyptic number.

222120121221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222120121221020 is an abundant number, since it is smaller than the sum of its proper divisors (301071534692452).

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

222120121221020 is a wasteful number, since it uses less digits than its factorization.

222120121221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90868563 (or 90868561 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222120121221020 its reverse (20122121021222), we get a palindrome (242242242242242).

The spelling of 222120121221020 in words is "two hundred twenty-two trillion, one hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty".