2221122123220 has 192 divisors, whose sum is σ = 6592245811200. Its totient is φ = 605410122240.

The previous prime is 2221122123211. The next prime is 2221122123229. The reversal of 2221122123220 is 223212211222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2221122123211) and next prime (2221122123229).

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 = 2221122123191 and 2221122123200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221122123229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2539230 + ... + 3299989.

It is an arithmetic number, because the mean of its divisors is an integer number (34334613600).

Almost surely, 2^{2221122123220} is an apocalyptic number.

2221122123220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221122123220 is an abundant number, since it is smaller than the sum of its proper divisors (4371123687980).

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

2221122123220 is a wasteful number, since it uses less digits than its factorization.

2221122123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5839278 (or 5839276 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 2221122123220 its reverse (223212211222), we get a palindrome (2444334334442).

The spelling of 2221122123220 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-three thousand, two hundred twenty".