222111121020 has 96 divisors (see below), whose sum is σ = 658583654400. Its totient is φ = 55737959424.

The previous prime is 222111121009. The next prime is 222111121021. The reversal of 222111121020 is 20121111222.

It is a super-2 number, since 2×222111121020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222111121021) 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, 13944621 + ... + 13960539.

It is an arithmetic number, because the mean of its divisors is an integer number (6860246400).

Almost surely, 2^222111121020 is an apocalyptic number.

222111121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222111121020 is an abundant number, since it is smaller than the sum of its proper divisors (436472533380).

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

222111121020 is a wasteful number, since it uses less digits than its factorization.

222111121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29627 (or 29625 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 222111121020 its reverse (20121111222), we get a palindrome (242232232242).

The spelling of 222111121020 in words is "two hundred twenty-two billion, one hundred eleven million, one hundred twenty-one thousand, twenty".