222120021220 has 24 divisors (see below), whose sum is σ = 466472470464. Its totient is φ = 88844117856.

The previous prime is 222120021181. The next prime is 222120021311. The reversal of 222120021220 is 22120021222.

It is a super-3 number, since 3×222120021220³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222120021194 and 222120021203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249307 + ... + 711613.

It is an arithmetic number, because the mean of its divisors is an integer number (19436352936).

Almost surely, 2^222120021220 is an apocalyptic number.

222120021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222120021220 is an abundant number, since it is smaller than the sum of its proper divisors (244352449244).

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

222120021220 is a wasteful number, since it uses less digits than its factorization.

222120021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486339 (or 486337 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 222120021220 its reverse (22120021222), we get a palindrome (244240042442).

The spelling of 222120021220 in words is "two hundred twenty-two billion, one hundred twenty million, twenty-one thousand, two hundred twenty".